The city line Roy
A stepped corner, an unincorporated gap and four addresses that mislead
Where Roy begins and ends, and the four Roy addresses that are not in Roy.
Roy covers 8.148 square miles of south western Weber County with no water area at all, and the line around it is stepped rather than square. Four well known places carry a Roy postal address and stand on somebody else's ground: the aerospace museum, one elementary school, the eastern half of the rebuilt interchange, and the district that bills the sprinkler water. None of that is an error. It is what happens when a postal service and a municipality draw two different maps.
The short answer
Roy covers 8.148 square miles of south western Weber County with no water area at all, and the city line is stepped rather than square, so four well known places carry a Roy postal address and stand on somebody else's ground. The Hill Aerospace Museum is on Riverdale ground at the edge of the installation. Freedom Elementary, which Roy City lists with a Roy address, sits on a Hooper parcel. The eastern half of the rebuilt 5600 South interchange is Riverdale's. And the office of the district that bills Roy's sprinkler water is in Riverdale too. A mailing address here is a postal fact, not a jurisdiction. Checked August 2026.
The live question
Is the Hill Aerospace Museum in Roy, and does the answer change anything about visiting?
The museum stands on Riverdale ground, and its mailing address says Roy. Both of those are true at the same time and neither one is a mistake. The Weber County assessor's parcel record puts the ground inside Riverdale, on a federally owned tax exempt parcel of about seventeen acres, and the state and federal boundary layers agree with it. The operator prints a Hill Air Force Base postal address and names Roy in its own site heading, because that is the postal arrangement for a building at the edge of a federal installation.
None of it changes the visit by a minute. The museum opens Tuesday to Saturday from nine until four, admission is free, parking is free, and the operator states in its own words that the museum is off base by the North or Roy Gate and that base access is not required. What is genuinely Roy's is the approach: freeway exit 338 is this city's own interchange and the museum's own directions send you through it.
So the honest sentence, if you need one, is that the area's free aerospace museum is minutes from Roy's exit and stands across the line in Riverdale. The collection, the galleries and the events belong to the Hill Air Force Base guide in Davis County, which carries the installation and everything on it.
The reason this page exists is that the museum is not the only one. Along Roy's southern and western edges the postal city and the municipal city come apart repeatedly, and a household drawing conclusions about schools, utility bills, emergency response or a resident rate from an envelope will get at least one of them wrong. Checked August 2026.
Four Roy addresses
Four well known places that print a Roy address and sit on somebody else's ground.
Each of the four below is real, each is a short drive from the middle of Roy, and each one is somewhere else on the county's own parcel record. Together they are the reason nobody should settle a jurisdiction question here from a mailing address.
| The place | The address it prints | Whose ground it stands on | Why it matters |
|---|---|---|---|
| Hill Aerospace Museum | A Hill Air Force Base postal address, with Roy in the operator's own site heading | Riverdale, on a federally owned parcel of about seventeen acres at the installation's edge | It is the single most quoted Roy attraction and it is not in Roy. Reached from Roy's exit 338, free, and worth every minute |
| Freedom Elementary | A Roy postal address, printed on Roy City's own list of public schools | Hooper, on a parcel of about seven and a half acres | A household reading the city's schools page could reasonably assume this is a Roy school. The county assessor says otherwise |
| The eastern half of the 5600 South interchange | Signed as Roy's exit 338 | Riverdale, from about 1700 West east | The city line falls inside the interchange footprint, so both cities own part of the thing the transport department finished in August 2026 |
| Roy Water Conservancy District | It bills sprinkler water to Roy households and carries the city's name | Riverdale, at 5440 Freeway Park Drive | It is a separate government from the city, with its own account and its own bill, and its office is over the line |
Jurisdiction from the Weber County Assessor's parcel record and from the state and federal boundary layers, read August 2026. Addresses as each body prints them. None of these is an error by anybody: a postal address is issued by the postal service and a city line is drawn by a municipality, and the two have no obligation to agree.
The Freedom Elementary case is the one with real consequences for a household, so it is worth stating plainly. Roy City's own public schools page names nine buildings and eight of them stand on Roy parcels: Roy High, Roy Junior High, Sand Ridge Junior High, and the Roy, Lakeview, Midland and Municipal elementaries, plus Bridge Elementary, which the city itself labels a public charter school rather than a district one. Freedom Elementary is the ninth, it carries a Roy postal address, and its parcel is in Hooper. All of them are in Weber School District either way, and the district rather than the city runs the boundary tool that says which building an address feeds.
The wider lesson is one this whole part of the valley keeps teaching. Take the postal city off the table before drawing any conclusion about which government bills the utilities, answers an emergency call, sets a resident rate at the swimming pool or runs the street outside. In Roy those answers are usually the city, and along the southern and western edges they sometimes are not.
The shape of the city
A stepped north western corner, an unincorporated gap, and 170 feet of fall from east to west.
Roy looks like a rectangle on a road map and is not one. Along 5600 South at the southern edge the city runs from about 1750 West all the way out to about 4400 West, with Riverdale east of that and Hooper picking up somewhere between 4300 and 4500 West. That is a clean line. The north western corner is where it gets interesting.
Going north up 1900 West, the city holds the frontage from at least 4400 South up to somewhere between 3400 South and 3200 South, and then it simply stops. What follows is not West Haven: it is unincorporated Weber County, a genuine gap on that alignment, and West Haven begins again further north around 3000 South. The two cities do not meet on 1900 West at all. Further west the line steps south as you go: at 2700 West it falls between 3800 and 3600 South, at 3000 West it is already south of 4000 South, and at 4300 West it is somewhere between 4800 and 4400 South. West Haven wraps Roy's north western shoulder rather than sitting squarely beside it.
Then the ground itself. Roy is universally described as flat and it is very gently tilted: 4,531 feet at city hall on the eastern side, 4,468 feet at the rail platform, and 4,361 feet at the outdoor pool out west, all measured on the U.S. Geological Survey's one meter elevation service. That is about 170 feet of fall across a mile and a third, which is invisible in a car and entirely obvious on a bicycle heading home into the afternoon wind.
And one small clean fact that says more than it looks. Roy holds 8.148 square miles of land and, uniquely among its neighbours, no water area whatsoever on the federal boundary record. There is no river frontage, no reservoir, no pond of any consequence and no lake shore inside the line. This is a city made entirely of grid.
Two numbers about Roy that circulate and are wrong
The elevation figure of about 4,377 feet appears everywhere and does not match any of the three points measured on the Geological Survey's service. The nearest thing to a single correct answer is 4,531 feet at city hall, and the better answer is that no single number describes a city that falls 170 feet across itself.
The other is the count of Roy's parks. Nine is the figure in general circulation. Roy City's own parks page lists eleven entries, and it publishes an address for only four of them and an acreage for none. Eleven is the city's number and it is the one to use.
The details
Getting there
The practical version is a single habit. Before you conclude anything about a Roy address, pull the parcel at the Weber County Assessor rather than reading the postal city off the envelope. It takes a few minutes, it is free, and along the southern and western edges of this city it is the difference between the right answer and a confident wrong one.
Before you go
- Roy and West Haven do not meet on 1900 West. There is unincorporated county between them on that alignment.
- Roy's frontage on 5600 South runs from about 1750 West west to about 4400 West. Riverdale is east; Hooper is west.
- The city falls about 170 feet from city hall east to the outdoor pool west, on the Geological Survey's own readings.
- 8.148 square miles of land and no water area at all. There is no river or reservoir inside the line.
- Roy City lists eleven park entries, not the nine that circulates, and publishes addresses for four of them.
Living with it
What the line actually decides once you own something on one side of it.
For a household the city line is not trivia. It decides which government bills the culinary water, whose fire engine and whose police car answer the call, whose parks and recreation department sets the price at the pool door, and which city's ordinances govern what can be built next to the property. In Roy those answers are mostly the city, and Roy keeps more of them in house than a lot of places its size: its own fire and rescue with two stations, its own police department, and its own parks and recreation with its own fee schedule.
The resident rate is the one that shows up first and smallest. Roy prices almost everything twice: twenty five dollars for a park pavilion block if you live here and fifty if you do not, a seventy dollar pool punch pass against seventy five, thirty five dollars a month at the recreation complex against forty five. None of it is large in isolation and all of it adds up over a year, and every one of those doubles keys on whether the parcel is inside the line rather than on what the envelope says. The page on the two pools has the full table.
The one that costs real money is the sprinkler water, because it is not the city at all. Secondary irrigation in Roy comes from the Roy Water Conservancy District, a separate government created in 1965 with an office in Riverdale, and it sends its own bill. As of August 2026 the district publishes a 20 percent allocation reduction for the season under drought conditions. The page on moving here works through the whole utility picture.
A postal address settles nothing about jurisdiction in this part of Weber County, and four well known places prove it. The Hill Aerospace Museum prints a Roy heading and stands on Riverdale ground. Freedom Elementary appears on Roy City's own schools page with a Roy address and sits on a Hooper parcel. The eastern half of the interchange signed as Roy's exit 338 is in Riverdale. And the district that bills Roy's sprinkler water, which carries the city's name, keeps its office in Riverdale. None of those is an error by anybody. Postal addresses are issued by the postal service and city lines are drawn by municipalities, and the two have never been obliged to agree. Settle jurisdiction from the county's own parcel record before you conclude anything about schools, utilities, emergency response or a resident rate.
Eight square miles of pure grid with no water in it at all, a corner that steps rather than turns, and four famous Roy addresses in other people's cities. Read the parcel, not the envelope.
The line, in numbers
Four measurements that fix Roy on the map.
Roy's boundary, in numbers
8.148 sq mi
of land on the federal boundary record, with no water area at all
4,531 ft
at city hall on the Geological Survey's elevation service, falling to 4,361 out west
1750 W
roughly where Roy's frontage on 5600 South begins, with Riverdale east of it
4
well known places with a Roy address that stand on another city's ground
Keep reading
Five more pages on Roy, and the question each one answers.
The ranked list
The top 8 things to do in Roy
Eight picks with the hours, the fees and the two ways a visit goes wrong.
Read the guideSwim and play
The Aquatic Center and the Rec Complex
An outdoor pool that runs late on Mondays and an indoor one that opens at five.
Read the guideThe festival
Roy Days and the city's four events
Sixteen days, a parade at nine, and a fireworks rule about where you cannot stand.
Read the guideGetting out
The Roy Gate and the commute
A gate with the city's name on it, a shared interchange, and a train six days a week.
Read the guideMoving here
Moving to Roy
Two water bills, two fire stations, eight schools, and a branch library that opens at ten.
Read the guideThe whole set
Roy, start to finish
Eight square miles, eleven parks, two pools, a two week festival and a gate at exit 338.
Open the companionQuick answers
The city line, answered.
Riverdale, and its mailing address says Roy. The Weber County assessor's parcel record puts the museum's ground inside Riverdale on a federally owned tax exempt parcel of about seventeen acres, and the state and federal boundary layers agree. The operator prints a Hill Air Force Base postal address and names Roy in its own site heading, which is the postal arrangement for a building at the edge of a federal installation rather than a claim about a city line. What is genuinely Roy's is the way in: freeway exit 338 is this city's interchange and the museum's own directions use it.
8.148 square miles, and uniquely among its neighbours it has no water area at all on the Census Bureau's current boundary record. There is no river frontage, no reservoir, no lake shore and no pond of any consequence inside the city line, which is why every outdoor subject in this city is a park, a pool or a road. The city is roughly four miles across at its widest point, and almost every trip from one side of it to the other takes about ten minutes on the numbered grid.
It depends where you stand, which is the useful answer rather than an evasion. The U.S. Geological Survey's one meter elevation service reads 4,531 feet at the Municipal Center on the eastern side, 4,468 feet at the rail platform, and 4,361 feet at the outdoor pool out west. That is about 170 feet of fall across a mile and a third. The figure of about 4,377 feet that circulates widely does not match any of those three points. Roy is described everywhere as flat; it is more accurate to call it gently tilted from east to west.
It carries a Roy postal address and its parcel is in Hooper. Roy City's own public schools page lists nine buildings with addresses and eight of them stand on Roy parcels; Freedom Elementary is the ninth, and the Weber County assessor assigns its roughly seven and a half acre parcel to Hooper. Both boundary layers agree. Roy City is printing a mailing address, which is what a city does, and the parcel record is the authority on jurisdiction. All of the schools involved are in Weber School District either way, and the district runs the boundary tool.
Riverdale to the east, West Haven around the north western shoulder, Hooper to the west, and the Davis County line with the Air Force installation to the south. The one that surprises people is West Haven: the two cities do not meet on 1900 West at all, because there is a genuine strip of unincorporated Weber County between them on that alignment, with Roy running north to somewhere between 3400 and 3200 South and West Haven picking up again around 3000 South. Further west the Roy line steps south as you go, so West Haven wraps the corner rather than sitting squarely alongside.
Because Hooper and Roy number the same east to west alignment off two different grid origins, so the street changes number at the city line without changing direction. Roy Elementary sits at 2888 W 5600 S in Roy and Freedom Elementary at 4555 W 5500 S in Hooper, on what is functionally one road. The state highway statute takes the same view, describing SR-97 as running from Route 37 east on 5500 South Street in Hooper to the Hill Air Force Base gate. If a satellite navigation system puts you a block off out west, this is usually the reason.
Eleven entries on the city's own parks page, not the nine that circulates: a dog park, a rail trail, Emma Russell, Foxglen, Frank Tremea Roy, George E. Wahlen, McCall, Memorial, Municipal, Roger Phil Burnett Meadow Creek Pond and Roy West. Only four of those carry a published address, and the city publishes no acreage for any of them. The four with addresses are also the four with pavilions the city rents. For the other seven the city gives a name and nothing else, so they cannot be planned around from the published record.
In small ways constantly, and in one way that matters. Roy prices almost everything twice: a park pavilion block is twenty five dollars for a resident and fifty for everybody else, a pool punch pass is seventy against seventy five, and a month at the recreation complex is thirty five against forty five. Every one of those keys on whether the parcel is inside the line rather than on the postal address. The larger one is water: sprinkler water in Roy comes from a separate government, the Roy Water Conservancy District, which sends its own bill on top of the city's.
Pull the parcel at the Weber County Assessor and read the city from that. It is free, it takes a few minutes, and along Roy's southern and western edges it is the difference between a right answer and a confident wrong one. Do it before you conclude anything about which government bills the utilities, whose fire engine answers the call, which resident rate applies at the swimming pool, or what can be built on the ground next door. Four well known places in this area print a Roy address and stand on another city's parcel.
Eight square miles of grid and a line worth checking before you conclude anything.
This is the page that saves people from a confident mistake, and the mistake is always the same shape: reading a jurisdiction off an envelope. Before an offer on anything near Roy's southern or western edge, pull the parcel at the county and settle which city the ground is actually in, because that decides the utility bill, the emergency response, the resident rate and the ordinances that govern the lot next door. Ask the school district which buildings the address feeds rather than reading the city's own list, since one school on that list sits on a Hooper parcel. And find out whether the parcel is on the sprinkler water district's system as well as the city's, because in Roy that is a second government and a second bill. Tell me what you are weighing and I will introduce you to a Weber and Morgan partner agent who can pull the parcel and put the right questions into the contract, and stay on the file for the financing side.
Referral disclosure. Outside Southern Utah, I connect home sellers and buyers with partner agents I trust in their area. If you choose to work with an agent I refer, that agent's brokerage pays my brokerage (Real Broker, LLC) a referral fee. The fee comes out of the agent's compensation; it is not an added cost to you. You are always free to choose any agent you wish, and using a referred agent is never required.