County
· Illinois
Warren County
Warren County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 16,835. Its county seat is Monmouth.
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Cities and towns 5
Townships 15
- Township of Berwick pop. 301
- Township of Coldbrook pop. 426
- Township of Ellison pop. 308
- Township of Floyd pop. 406
- Township of Greenbush pop. 523
- Township of Hale pop. 323
- Township of Kelly pop. 365
- Township of Lenox pop. 264
- Township of Monmouth pop. 9,799
- Township of Point Pleasant pop. 132
- Township of Roseville pop. 1,144
- Township of Spring Grove pop. 949
- Township of Sumner pop. 485
- Township of Swan pop. 236
- Township of Tompkins pop. 870
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 207766
- FIPS state
- 17
- FIPS county
- 187
- FIPS place
- 99187
- Census record name
- COUNTY OF WARREN
- Mailing address
- 100 W BROADWAY, MONMOUTH 61462