Pulaski County, Illinois
County seat: Mound City · Population 4,820 (2025) · 199 sq mi
Pulaski County is the 97th most populous of Illinois's 102 counties, with 4,820 people (2025 estimate). Its county seat is Mound City. It is part of the Southern region, one of the 10 Illinois economic development regions (DCEO). The map shows its 7 cities and towns and the 6 neighboring counties.
Pulaski County facts
- County seat
- Mound City
- Population (2025 estimate)
- 4,820 −7.4% since 2020
- Land area
- 199 sq mi 100th largest of 102
- Water area
- 4 sq mi
- Population density
- 24 per sq mi
- Established
- 1843
- Same name
- One of 7 Pulaski Counties in the US
- Named after
- Casimir Pulaski Polish nobleman, general in the American Revolutionary War
- Largest city
- Mounds 600
- Median household income
- $42,463
- Cities and towns
- 7
- ZIP codes
- 10
- Time zone
- Central
- FIPS code
- 17153
Cities and towns in Pulaski County
Pulaski County has 7 incorporated cities, towns and villages. Populations count the people living inside Pulaski County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Mounds | City | 600 | |
| Mound City (county seat) | City | 477 | |
| Ullin | Village | 457 | |
| Karnak | Village | 394 | |
| Olmsted | Village | 265 | |
| New Grand Chain | Village | 143 | |
| Pulaski | Village | 142 |
ZIP codes in Pulaski County
10 ZIP codes reach into Pulaski County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 62923 also Johnson and Union counties
- 62926 also Union County
- 62941 also Massac County
- 62956 also Massac County
- 62963
- 62964
- 62970
- 62976
- 62992 also Alexander County
- 62996
Population of Pulaski County, 2020–2025
Pulaski County shrank by 386 people (−7.4%) between April 2020 and July 2025: 193 more deaths than births and a net loss of 185 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 5,176 |
| 2021 | 5,092 |
| 2022 | 4,963 |
| 2023 | 4,967 |
| 2024 | 4,883 |
| 2025 | 4,820 |
Neighboring counties
- Alexander County west · 4,570 people
- Ballard County, Kentucky southeast · 7,594 people
- Union County north · 16,656 people
- Johnson County northeast · 13,363 people
- Massac County east · 13,502 people
- McCracken County, Kentucky southeast · 67,553 people
Printable Pulaski 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) (94 KB)
- PNG (2400 px) (90 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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