Lyons is a town in Boulder County, Colorado, home to about 1,838 people across 1.4 square miles. Its ZIP code is 80540.
Homes sold for a median of $371 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Lyons. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Lyons’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Denver International Airport (DEN)43 miles away |
|---|---|
| Closer regional airport | Rocky Mountain Metropolitan Airport (BJC)25 miles away |
| Nearest city of 250,000+ | Denver, CO40 miles away |
| Nearest city of 1 million+ | Phoenix, AZ593 miles away |
Straight-line distances from the center of Lyons; 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.
Lyons had 2,209 residents in the 2020 census, up 39% since 2000.
It’s the 178th 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 80°F in summer, and winter lows average 16°F. About 17.6 inches of rain and melted snow fall in a typical year, with about 104 inches of snow.
Source: NOAA 1991–2020 climate normals, Estes Park 3 Sse, CO weather station (13 miles 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).
34 doctors and other health care providers list an office in Lyons.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 2 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 17 |
| Physical and occupational therapists | 8 |
| Chiropractors | 1 |
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.
Libraries
Museums
Theaters and performance venues
Counts are within about 1 mile 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.
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 |
|---|---|---|---|---|
| Lyons Elementary SchoolLyons | Pre-K–5 | 255 | Public | 2.9 mi |
| Lyons Middle/Senior High SchoolLyons | 6–12 | 344 | Public | 3.4 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 Allenspark.
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.