Longmont is a city in Boulder County, Colorado, home to about 99,406 people across 29 square miles. Its ZIP codes are 80501, 80503 and 80504.
Homes sold for a median of $270 per square foot across 3 ZIP codes in the three months ending August 2026, and 2 of 3 were seller’s markets.
Mostly Longmont
Mostly Longmont; also Niwot and Boulder
Mostly Longmont; also Firestone and Frederick
Each card is that ZIP code’s whole market, including any part outside Longmont. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Longmont’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Longmont well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Denver International Airport (DEN)29 miles away |
|---|---|
| Closer regional airport | Rocky Mountain Metropolitan Airport (BJC)17 miles away |
| Nearest city of 250,000+ | Denver, CO29 miles away |
| Nearest city of 1 million+ | Phoenix, AZ598 miles away |
Straight-line distances from the center of Longmont; 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.
Longmont had 98,885 residents in the 2020 census, up 39% since 2000.
It’s the 14th largest of 472 towns in Colorado by population.
Boulder County grew from 21,544 residents in 1900 to 330,758 in 2020.
Boulder County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 91°F in summer, and winter lows average 14°F. About 15.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Longmont 2 Ese, CO weather station (about a mile away).
159,619 jobs at 12,990 businesses in Boulder County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1,733 doctors and other health care providers list an office in Longmont’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 155 |
|---|---|
| Specialist doctors | 206 |
| Dentists | 131 |
| Nurse practitioners and physician assistants | 257 |
| Mental health providers | 607 |
| Physical and occupational therapists | 250 |
| Optometrists | 42 |
| Chiropractors | 85 |
| Pharmacies | 33 |
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 (29 nearby)
Grocery stores (12 nearby)
Pharmacies (5 nearby)
Libraries (2 nearby)
Museums (2 nearby)
Theaters and performance venues (3 nearby)
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 1871.
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 St. Vrain Valley School District No. Re1J. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Alpine Elementary SchoolLongmont | Pre-K–5 | 388 | Public | 2.9 mi |
| Blue Mountain ElementaryLongmont | Pre-K–5 | 542 | Public | 5.8 mi |
| Burlington Elementary SchoolLongmont | Pre-K–5 | 320 | Public | 2.4 mi |
| Centennial ElementaryFirestone | Pre-K–5 | 525 | Public | 5.6 mi |
| Central Elementary SchoolLongmont | Pre-K–5 | 344 | Public | 2.5 mi |
| Columbine Elementary SchoolLongmont | Pre-K–5 | 231 | Public | 2.0 mi |
| Eagle Crest Elementary SchoolLongmont | Pre-K–5 | 421 | Public | 5.2 mi |
| Fall River Elementary SchoolLongmont | Pre-K–5 | 520 | Public | 2.0 mi |
| Firestone Charter AcademyFirestone | Pre-K–8 | 600 | Charter | 6.2 mi |
| Flagstaff Charter AcademyLongmont | Pre-K–8 | 725 | Charter | 3.5 mi |
| Hygiene Elementary SchoolLongmont | Pre-K–5 | 313 | Public | 6.5 mi |
| Indian Peaks Elementary SchoolLongmont | Pre-K–5 | 214 | Public | 3.0 mi |
| Legacy Elementary SchoolFrederick | Pre-K–5 | 430 | Public | 5.8 mi |
| Longmont Estates Elementary SchoolLongmont | Pre-K–5 | 365 | Public | 5.0 mi |
| Mountain View Elementary SchoolLongmont | Pre-K–4 | 321 | Public | 3.4 mi |
| Niwot Elementary SchoolNiwot | Pre-K–5 | 411 | Public | 5.9 mi |
| Northridge Elementary SchoolLongmont | Pre-K–5 | 318 | Public | 3.6 mi |
| Prairie Ridge Elementary SchoolFirestone | Pre-K–5 | 387 | Public | 7.0 mi |
| Rocky Mountain Elementary SchoolLongmont | Pre-K–5 | 315 | Public | 1.2 mi |
| Sanborn Elementary SchoolLongmont | Pre-K–5 | 209 | Public | 4.3 mi |
| St. Vrain Community Montessori SchoolLongmont | Pre-K–8 | 260 | Charter | 2.5 mi |
| Timberline PK-8Longmont | Pre-K–8 | 762 | Public | 2.1 mi |
| St. Vrain LaunchED Virtual AcademyLongmont | K–12 | 342 | Public | 2.8 mi |
| Twin Peaks Classical AcademyLongmont | K–12 | 879 | Charter | 2.9 mi |
| Longs Peak Middle SchoolLongmont | 5–8 | 381 | Public | 3.5 mi |
| Altona Middle SchoolLongmont | 6–8 | 715 | Public | 5.3 mi |
| Coal Ridge Middle SchoolFirestone | 6–8 | 727 | Public | 6.8 mi |
| Sunset Middle SchoolLongmont | 6–8 | 316 | Public | 3.1 mi |
| Trail Ridge Middle SchoolLongmont | 6–8 | 435 | Public | 1.6 mi |
| Westview Middle SchoolLongmont | 6–8 | 621 | Public | 5.4 mi |
And 8 more.
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Boulder Valley Waldorf SchoolNiwot | Pre-K–8 | 95 | Nonsectarian | 7.5 mi |
| Gateway Montessori SchoolLongmont | Pre-K–K | 10 | Nonsectarian | 3.1 mi |
| Longmont Christian SchoolLongmont | Pre-K–8 | 47 | Christian (no specific denomination) | 2.7 mi |
| Primrose School of LongmontLongmont | Pre-K–K | 19 | Nonsectarian | 3.9 mi |
| Rocky Mountain Christian AcademyNiwot | Pre-K–8 | 98 | Christian (no specific denomination) | 5.1 mi |
| St John the Baptist Catholic SchoolLongmont | Pre-K–8 | 185 | Roman Catholic | 2.0 mi |
| Hillside SchoolLongmont | 1–9 | 75 | Nonsectarian | 8.4 mi |
| Hopewell Baptist AcademyLongmont | 5–12 | 5 | Baptist | 2.6 mi |
| Crossroads SchoolLongmont | 7–12 | 30 | Christian (no specific denomination) | 3.0 mi |
| Msch Transitional SchoolLongmont | 7–11 | 11 | Church of Christ | 6.4 mi |
| Boulder Sudbury SchoolLongmont | Ungraded | 37 | Other religious | 10.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Firestone, Frederick, Niwot, Boulder and Mead.
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.