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Working as an Agent in Allen, TX: One County, Four School Districts
Short answer. Allen sits entirely in Collin County, but an Allen address can be in one of four school districts. The city grew from 43,554 residents in 2000 to 104,627 in 2020 and is now largely built out, so much of the work here is resale and repeat business. Check the district by address, and choose a brokerage that supports that kind of work.
A city that grew fast and then filled in
Allen had 43,554 residents in 2000, 84,246 in 2010 and 104,627 in 2020. The whole city lies in Collin County, so there is no county-line question on the tax roll.
Growth that steep in two decades means the housing is no longer new. Compare it with Frisco or Prosper, where new construction still drives much of the work. In Allen, expect to spend more time on resale details and on staying in touch with people you have already helped.
The city name does not tell you the school district
Allen ISD serves most of the city. Parts of Allen are in Lovejoy ISD, McKinney ISD and Plano ISD. A buyer who asks about "Allen schools" has four possible answers.
Look up the district for the exact address before you describe a school to anyone, and write down what you found.
Employers, a college campus and a car-first city
Wikipedia summarizes a recent employer list for the city that is led by Allen ISD, the City of Allen and Experian. Collin College opened a technical campus in west Allen in 2020.
Allen is not a DART member and has no fixed-route transit, and US 75 and State Highway 121 carry most traffic. Clients who commute decide by drive time. Ask each one how they travel before you suggest a neighborhood. That is our reading, not a market statistic.
A two-line check on every Allen file
Run both checks before you promise anything about taxes or schools.
- County: Collin, from the appraisal district record
- School district: Allen, Lovejoy, McKinney or Plano ISD, from the district's own lookup for that address
What the Census says about the homes in Allen
| Allen | |
|---|---|
| Population (5-year estimate) | 110,265 |
| Housing units | 39,094 |
| Homes built since 2010 | 27% |
| Homes built before 1990 | 7% |
| Median year built | 2003 |
| Owner-occupied homes | 69% |
| Vacant housing units | 4.7% |
| Median home value | $464,100 |
| Median gross rent | $1,932 |
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020 to 2024. These are estimates with margins of error, and 5-year figures lag the newer city estimates quoted elsewhere on this page.
What this suggests
- 27% of homes were built since 2010, and the median home dates to 2003. These are mostly established neighborhoods with some newer pockets. 69% of occupied homes are owner-occupied.
This is our reading of the numbers, not a Census statement. Every neighborhood differs.
Home sales snapshot, July 2026
These are closed sales of single-family homes in the month, from the multiple listing service, with the same month a year earlier for comparison.
| Allen | |
|---|---|
| Closed sales | 112 |
| Closed sales, year earlier | 83 |
| Median price | $508,000 |
| Median price, year earlier | $546,000 |
| Average days on market | 40 |
| Sold price as share of list price | 96.4% |
| Active listings | 313 |
| Months of inventory | 3.7 |
- Median price was $508,000, down 7% from a year earlier. Homes sold for 96.4% of list price on average after 40 days on market, and 313 homes were listed, about 3.7 months of supply. As a rough rule of thumb, that is a pace that tends to favor sellers.
Source: North Texas Real Estate Information System (NTREIS) single-family MLS data for July 2026, prepared by the Texas Real Estate Research Center at Texas A&M University. One month of data. Small cities have few sales, so figures can swing a lot from month to month. Sales by builders and sales not listed in the NTREIS MLS are not counted. Treat this as background, not a price for any particular home, and check current figures before you quote them.
Look-up list for Allen files
Search the property address on the appraisal district site to see which county tax roll it sits on. Check it on every file.
- Collin Central Appraisal District
- School district: use the district's own address lookup for the exact address
- Special district: ask whether the address sits in a PID or MUD before the contract
Common questions
Which county is Allen in?
Collin County. The whole city is in Collin County.
Which school district serves an Allen home?
Most homes are in Allen ISD. Some are in Lovejoy, McKinney or Plano ISD, depending on the address.
Does DART serve Allen?
No. Wikipedia reports that Allen is not a DART member city and has no fixed-route transit.
Sources
- Allen, Texas (Wikipedia, citing the U.S. Census Bureau)
- U.S. Census Bureau, American Community Survey 5-year estimates, 2020 to 2024 (via Census Reporter)
- North Texas Real Estate Information System (NTREIS) single-family MLS data for July 2026, prepared by the Texas Real Estate Research Center at Texas A&M University
Education only. Not legal, tax or financial advice. Population figures are U.S. Census Bureau counts or estimates as reported by the sources above. Confirm licensing and disclosure rules with the Texas Real Estate Commission and your broker.