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
If you are trying to work out whether an address is really in Roy, the short version is that the mailing address will not tell you and the county parcel record will. 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 city draw two different maps.
By Scott Buehler, Moving Utah
Updated October 2026
The short answer
To know whether a given address is really in Roy, pull the parcel at the Weber County Assessor and read the city off that; the mailing address settles nothing here. Roy covers 8.148 square miles of south western Weber County with no water area at all, and its 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.
The museum question
Is the Hill Aerospace Museum in Roy, and does the answer change the visit?
The museum stands on Riverdale ground, and its mailing address says Roy. Both are true at once and neither 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. 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, the current days and hours and the events all 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.
The museum, at a glance
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 rebuilt exit |
| Roy Water Conservancy District | It bills sprinkler water to Roy households and carries the city's name | Riverdale, where the district keeps its office | It is a separate government from the city, with its own account and its own bill, and its office is over the line |
Jurisdiction is from the Weber County Assessor's parcel record and the state and federal boundary layers; addresses are 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 northwest corner, an unincorporated gap, and a gentle tilt to the 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 northwest 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 northwest shoulder rather than sitting squarely beside it.
Then the ground itself. Roy is universally described as flat and it is very gently tilted: the U.S. Geological Survey's elevation service reads about 4,531 feet at the Municipal Center on the eastern side and about 4,361 feet at the outdoor pool out west, roughly 170 feet of fall from the Municipal Center to the pool, across a mile and a third, and about 350 feet across the whole city from the I-15 edge to the west side. That is easy to miss in a car and 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 neighbors, 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 to get right
The elevation figure of about 4,377 feet appears in a lot of general references and does not match the ground the Geological Survey reads. The nearest thing to a single correct answer is about 4,531 feet at the Municipal Center, and the better answer is that no single number describes a city that falls about 350 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, and each has its own address on the city site. 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.
Worth knowing
- 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 ground falls about 170 feet from the Municipal Center east to the outdoor pool west, and about 350 feet across the whole city, 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.
What the line decides
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 police department and its own parks and recreation with its own fee schedule, plus a fire department that is set to join the Weber Fire District in late December 2026 (not final).
The resident rate is the one that shows up first and smallest. Roy prices most of its recreation twice, a lower rate for residents and a higher one for everybody else, at the pool, the recreation complex and the rentable park pavilions. None of it is large on its own and it adds up over a year, and every one of those splits keys on whether the parcel is inside the line rather than on what the envelope says. The city publishes the current amounts and can change them, so confirm them with Roy; the page on the two pools walks through how the rates work.
The one that adds 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 that traces back to 1965 and keeps its office over the line in Riverdale, and it sends its own bill. It runs on a seasonal allocation it can tighten in a dry year, so check the district for the current season. The page on moving here works through the whole utility picture.
Three checks before you sign anything here
- Pull the parcel at the Weber County Assessor and read the city off that, not off the postal address. Along the southern and western edges of Roy the two disagree often enough to matter.
- Ask Weber School District which buildings the specific address feeds. The city's schools page lists what is nearby, and one school on it sits on a Hooper parcel.
- Check whether the parcel is on the Roy Water Conservancy District's system as well as the city's, because sprinkler water here is a second government and a second bill.
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.
Scott Buehler
Moving Utah About Scott
Quick 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 neighbors 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 elevation service reads about 4,531 feet at the Municipal Center on the eastern side and about 4,361 feet at the outdoor pool out west, roughly 170 feet of fall from the Municipal Center to the pool, across a mile and a third. Across the whole city the ground falls about 350 feet from the I-15 edge to the west side, most of it off the bluff just west of 2400 West. The figure of about 4,377 feet that circulates widely does not match the ground the survey reads. Roy is described everywhere as flat; it is more accurate to call it tilted from east to west, with most of the drop at the bluff.
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 northwest 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. Each has its own page on the city site with an address and hours, and four of them have pavilions the city rents.
In small ways constantly, and in one way that matters. Roy prices most of its recreation twice, a resident rate and a higher one for everybody else, and which rate you get keys on whether the parcel is inside the line rather than on the postal address. The city publishes the current amounts and can change them, so confirm them with Roy. The one that adds a whole separate bill is water: sprinkler water in Roy comes from the Roy Water Conservancy District, a separate government, which bills it on top of the city's charges.
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.
Or call Scott: (435) 357-4345or send Scott a message
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