Jefferson County, Illinois Cities (2025)

26 cities

City	Rank	2025 Pop. ↓	2020 Pop.	Change	Density	Area (mi²)	Type
Mount Vernon	1	14,041	14,556	-0.73%	958	14.65	City
Mount Vernon township	2	12,148	12,510	-0.37%	328	37.04	Township
Shiloh township	3	6,433	6,605	-0.31%	178	36.22	Township
Dodds township	4	2,672	2,728	-0.19%	73	36.78	Township
Spring Garden township	5	2,561	2,582	-0.12%	70	36.74	Township
Webber township	6	2,100	2,145	-0.19%	57	37	Township
Ina	7	1,655	1,649	0.06%	688	2.40	Village
Field township	8	1,495	1,509	0.07%	41	36.84	Township
McClellan township	9	1,188	1,219	-0.34%	33	35.63	Township
Casner township	10	1,140	1,167	-0.35%	32	35.95	Township
Pendleton township	11	1,128	1,157	-0.35%	32	35.49	Township
Grand Prairie township	12	885	905	-0.23%	24	36.21	Township
Bald Hill township	13	784	804	-0.25%	22	35.83	Township
Elk Prairie township	14	671	689	-0.45%	24	27.46	Township
Dix township	15	610	620	0%	11	53.95	Township
Bluford	16	600	622	-0.66%	378	1.59	Village
Woodlawn	17	596	613	-0.5%	700	0.85	Village
Farrington township	18	564	575	-0.18%	15	36.67	Township
Dix	19	454	466	-0.44%	219	2.07	Village
Waltonville	20	400	414	-0.74%	323	1.24	Village
Blissville township	21	377	379	0.27%	11	34.71	Township
Bonnie	22	361	375	-0.82%	283	1.27	Village
Moores Prairie township	23	348	360	-0.57%	10	36.40	Township
Belle Rive	24	298	308	-0.67%	290	1.03	Village
Opdyke	25	260	303	0%	492	0.53	CDP
Nason	26	197	201	-0.51%	216	0.91	City

Jefferson County Cities Summary

Mount Vernon is the largest city in Jefferson County, with a population of 14,041.