Summit County, Colorado

Summit County, Colorado
The Summit County Courthouse in Breckenridge
Location within the U.S. state of Colorado
Coordinates: 39°37′16″N 106°08′15″W / 39.621023°N 106.137555°W / 39.621023; -106.137555
Country United States
State Colorado
FoundedNovember 1, 1861
Named afterContinental Divide
SeatBreckenridge
Largest townSilverthorne
Area
 • Total
619.259 sq mi (1,603.87 km2)
 • Land608.328 sq mi (1,575.56 km2)
 • Water10.931 sq mi (28.31 km2)  1.77%
Population
 (2020)
 • Total
31,055
 • Estimate 
(2024)
30,882
 • Density51.050/sq mi (19.710/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Area code970 and 748
Congressional district2nd
Websitesummitcountyco.gov

Summit County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 31,055, and was estimated to be 30,882 in 2024. The county seat of Breckenridge. Summit County comprises the Breckenridge, CO Micropolitan Statistical Area.