Thornton ZIP code, Colorado
The ZIP code for Thornton, CO is 80241, and its area codes are 303, 720 and 983.
- USPS city name
- 1 ZIP code
- Overlapping the city
- 8 more
- Population
- 144,187
- County
- Adams County
- State
- Colorado
NANPA lists no telephone rate centre for Thornton itself, so these are the area codes of the nearest one, Denver (2.2 miles). A town on an area-code boundary can differ from its neighbour.
Mail addressed to Thornton uses the ZIP code above. 8 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.
Thornton in numbers
About 144,187 people live in Thornton, in 50,566 households, the 6th-largest of Colorado's 471 census places. The median household income is $103,088 a year, 8% above the Colorado median of $95,470 (US: $80,734). The median owner-occupied home is valued at $517,500 (4% below the Colorado median), and median gross rent is $1,895 a month. The median age is 34.7; 32.8% of adults 25 and over hold a bachelor's degree or higher (45.7% across Colorado); the average commute takes 30 minutes.
| Population | 144,187 |
|---|---|
| Households | 50,566 |
| Median age | 34.7 |
| Median household income | $103,088 |
| Median home value | $517,500 |
| Median gross rent | $1,895 |
| Bachelor's degree or higher | 32.8% |
| Mean commute | 30.4 min |
| Population density | 3,948 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Thornton city. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes addressed as Thornton
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
80241 | Thornton , CO | Standard | 34,082 | $110,218 | $542,100 |
Other ZIP codes overlapping Thornton
These ZIP codes cover part of Thornton but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
80023 | Broomfield , CO | Standard | 27,143 | $158,180 | $869,000 |
80221 | Denver , CO | Standard | 39,718 | $86,810 | $472,900 |
80229 | Denver , CO | Standard | 55,092 | $84,203 | $417,500 |
80233 | Denver , CO | Standard | 48,441 | $88,880 | $465,400 |
80260 | Denver , CO | Standard | 34,677 | $61,852 | $223,200 |
80602 | Brighton , CO | Standard | 44,783 | $151,737 | $667,000 |
80603 | Brighton , CO | Standard | 16,811 | $118,297 | $492,000 |
80640 | Henderson , CO | Standard | 13,818 | $117,373 | $497,100 |
Map of Thornton ZIP codes
The ZIP codes of Thornton, CO, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Thornton
The nearest larger towns are Denver (718,877 people, 11 mi), Lakewood (156,583 people, 18 mi) and Aurora (394,432 people, 19 mi).
| Town | Population | Distance |
|---|---|---|
| Northglenn | 38,014 | 2.2 mi |
| Federal Heights | 14,125 | 5.5 mi |
| Todd Creek | 5,379 | 5.6 mi |
| Derby | 8,453 | 5.7 mi |
| Welby | 16,197 | 5.7 mi |
| Broomfield | 76,304 | 6.2 mi |
| Sherrelwood | 18,692 | 6.5 mi |
| Shaw Heights | 5,565 | 6.8 mi |
| Westminster | 115,484 | 6.9 mi |
| Twin Lakes | 8,030 | 7.5 mi |
| Commerce City | 66,445 | 8.2 mi |
| Brighton | 42,059 | 8.4 mi |
| Berkley | 10,789 | 9.1 mi |
| Erie | 33,808 | 9.7 mi |
More nearby: every ZIP code in Adams County · Colorado ZIP codes
Cite this page
zipcodes.pro. “Thornton, CO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/co/thornton
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