Sedgwick County, Colorado

Sedgwick County population, land area and income

Sedgwick County had 2,257 residents in the Census Vintage 2024 estimate, on 548.0 square miles of land. It ranks 58th of 64 in Colorado by population and 57th by land area. That works out to 4.1 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Colorado has 15,336 residents, so Sedgwick County has 15% of the typical county's population.

Its SAIPE 2023 median household income of $45,999 is in the bottom quarter among 3,143 counties with an estimate.

How Sedgwick County's population changed since 2020

Sedgwick County lost 132 residents between the July 2020 and July 2024 estimates, a drop of 5.5%. That ranks 63rd of 64 in Colorado for growth. The median Colorado county changed by +1.7%, and the state as a whole by +2.9%.

Since the April 2020 estimates base, Sedgwick County recorded 72 births and 204 deaths, a natural change of -132. Net international migration added +10 and net domestic migration, people moving to or from other US counties, came to -20. The largest single component was natural change, which removed 132 people.

Where Sedgwick County is

The Census internal point of Sedgwick County is at 40.871600, -102.355400. It sits in UTM zone 13N. The map shades Colorado's 64 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sedgwick County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Sedgwick County

One incorporated place of 1,000+ people has residents in Sedgwick County, 1,223 people together, or 54% of the county. Each figure counts only the part of the town inside Sedgwick County; towns marked "part" extend into another county. The largest is Julesburg with 1,223.

Counties bordering Sedgwick County

The Census 2024 county adjacency file lists 5 neighbors for Sedgwick County, including 3 across a state line. The most populous is Logan County, CO, with 20,755 residents. Distances run between Census internal points in a straight line.

• Logan County

  20,755 people

  40 mi WSW

• NE

  Cheyenne County, NE

  9,602 people

  42 mi NW

• Phillips County

  4,488 people

  19 mi S

• NE

  Perkins County, NE

  2,779 people

  38 mi E

• NE

  Deuel County, NE

  1,892 people

  17 mi N

Distance to Denver and the nearest big city

Denver is 159.1 miles WSW of Sedgwick County's internal point in a straight line. The nearest place of 100,000 or more is Greeley, CO (population 114,363), 130.6 miles away. The nearest place of 10,000 or more is Sterling, CO (population 13,114), 47.2 miles away.

Sedgwick County FIPS code

The FIPS code of Sedgwick County is 08115: state code 08 for Colorado plus county code 115. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $45,999.