Denison is a city in Grayson County, Texas, home to about 25,778 people across 29 square miles. Its ZIP codes are 75020 and 75021.
Homes sold for a median of $147 per square foot across 2 ZIP codes in the three months ending August 2026, and 0 of 2 were seller’s markets.
Each card is that ZIP code’s whole market, including any part outside Denison. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Denison’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Dallas Love Field (DAL)64 miles away |
|---|---|
| Nearest city of 250,000+ | Plano, TX49 miles away |
| Nearest city of 1 million+ | Dallas, TX67 miles away |
Straight-line distances from the center of Denison; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Denison had 24,479 residents in the 2020 census, up 7% since 2000.
It’s the 128th largest of 1,778 towns in Texas by population.
Grayson County grew from 63,661 residents in 1900 to 135,543 in 2020.
Grayson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 93°F in summer, and winter lows average 34°F. About 44.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Sherman, TX weather station (6 miles away).
42,994 jobs at 2,899 businesses in Grayson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
358 doctors and other health care providers list an office in Denison’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 51 |
|---|---|
| Specialist doctors | 99 |
| Dentists | 28 |
| Nurse practitioners and physician assistants | 76 |
| Mental health providers | 46 |
| Physical and occupational therapists | 36 |
| Optometrists | 6 |
| Chiropractors | 16 |
| Pharmacies | 11 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (11 nearby)
Grocery stores (2 nearby)
Pharmacies (3 nearby)
Libraries
Museums (1 nearby)
Theaters and performance venues
Counts are within about 3.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1872.
Colleges and universities
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Denison ISD, Sherman ISD, Pottsboro ISD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Houston ElDenison | Pre-K–4 | 255 | Public | 0.7 mi |
| Hyde Park ElDenison | Pre-K–4 | 502 | Public | 1.7 mi |
| Lamar ElDenison | Pre-K–4 | 425 | Public | 1.1 mi |
| Mayes ElDenison | Pre-K–4 | 508 | Public | 1.9 mi |
| Perrin Early Childhood CenterDenison | Pre-K | 168 | Public | 6.5 mi |
| Terrell ElDenison | Pre-K–4 | 432 | Public | 1.6 mi |
| B Mcdaniel IntDenison | 5–6 | 708 | Public | 2.1 mi |
| Tri Co Juvenile DetentDenison | 6–12 | 21 | Alternative Education | 7.1 mi |
| Cooke/Fannin/Grayson Co Juvenile Post Ajud FacDenison | 7–11 | 62 | Alternative Education | 7.1 mi |
| Grayson County JjaepDenison | 7–10 | 3 | Alternative Education | 7.1 mi |
| Henry Scott MiddleDenison | 7–8 | 733 | Public | 0.4 mi |
| Grayson County Juvenile Justice AepDenison | 8 | 1 | Alternative Education | 7.1 mi |
| Denison H SDenison | 9–12 | 1,351 | Public | 3.4 mi |
| Grayson County Jjaep - DenisonDenison | 9 | 1 | Alternative Education | 7.2 mi |
| Pathways H SDenison | 9–12 | 62 | Alternative Education | 0.8 mi |
| Jefferson Learning CtrDenison | 10–12 | 82 | Alternative Education | 6.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Sherman.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.