Sedgwick County, Colorado
County seat: Julesburg · Population 2,247 (2025) · 548 sq mi
Sedgwick County is the 58th most populous of Colorado's 64 counties, with 2,247 people (2025 estimate). Its county seat is Julesburg. It is part of the Region 1: Northern Eastern Plains region, one of the 14 Planning and Management Regions of Colorado. The map shows its 3 cities and towns and the 5 neighboring counties.
Sedgwick County facts
- County seat
- Julesburg
- Population (2025 estimate)
- 2,247 −6.5% since 2020
- Land area
- 548 sq mi 57th largest of 64
- Water area
- 1 sq mi
- Population density
- 4 per sq mi
- Established
- 1889
- Named after
- Fort Sedgwick U.S. military post in Colorado, United States
- Largest city
- Julesburg 1,217
- Median household income
- $52,386
- Cities and towns
- 3
- ZIP codes
- 5
- Time zone
- Mountain
- FIPS code
- 08115
Cities and towns in Sedgwick County
Sedgwick County has 3 incorporated cities, towns and villages. Populations count the people living inside Sedgwick County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Julesburg (county seat) | Town | 1,217 | |
| Ovid | Town | 256 | |
| Sedgwick | Town | 162 |
ZIP codes in Sedgwick County
5 ZIP codes reach into Sedgwick County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 69168
- 80731 also Phillips, Logan and Yuma counties
- 80737
- 80744
- 80749
Population of Sedgwick County, 2020–2025
Sedgwick County shrank by 157 people (−6.5%) between April 2020 and July 2025: 138 more deaths than births and a net loss of 18 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 2,391 |
| 2021 | 2,327 |
| 2022 | 2,290 |
| 2023 | 2,313 |
| 2024 | 2,271 |
| 2025 | 2,247 |
Neighboring counties
- Phillips County south · 4,420 people
- Deuel County, Nebraska north · 1,862 people
- Logan County west · 20,654 people
- Perkins County, Nebraska east · 2,849 people
- Cheyenne County, Nebraska northwest · 9,528 people
Printable Sedgwick County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (54 KB)
- PNG (2400 px) (52 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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