County
Jefferson County
Illinois • United States
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Jefferson County is a county in Illinois, United States. It has a population of about 37,113 and an area of 1,512 km². It contains 2 towns with a combined population of about 17,447. The largest are Mount Vernon (15,087) and Ina (2,360). It was established in 1819. 3 official videos are published about the United States.
- Area
- 1,512 km²
- Established
- 1819
- Official website
- jeffersoncounty.illinois.gov
Referenced in
Nou ka jwenn enfòmasyon sou kote sa a, e nou ka jwenn yon sèvis ki byen òganize e ki pa gen okenn rapò ak pwodui ki fèt.
Place data from GeoNames, used under CC BY 4.0 and modified for this site.


