Marion County, Ohio Cities (2025)

32 cities

City	Rank	2025 Pop. ↓	2020 Pop.	Change	Density	Area (mi²)	Type
Marion township	1	43,802	43,944	0.47%	1,194	36.67	Township
Marion	2	35,209	36,013	-0.46%	2,716	12.96	City
Marion township	3	6,736	6,629	0.25%	159	42.37	Township
Marion township	4	5,522	5,510	0.16%	218	25.36	Township
Pleasant township	5	5,021	4,903	0.62%	178	28.27	Township
Marion township	6	3,384	3,330	0.42%	82	41.41	Township
Marion township	7	3,271	3,132	0.89%	145	22.63	Township
Claridon township	8	2,826	2,825	0%	77	36.82	Township
Marion township	9	2,397	2,508	-1.15%	65	37.02	Township
Marion township	10	2,254	2,298	-0.22%	68	33.20	Township
Montgomery township	11	2,068	2,082	0.05%	73	28.43	Township
Prospect township	12	1,996	2,020	-0.05%	82	24.28	Township
Richland township	13	1,808	1,781	0.28%	59	30.78	Township
Grand Prairie township	14	1,537	1,561	-0.32%	63	24.24	Township
Marion township	15	1,476	1,488	-0.07%	65	22.60	Township
Marion township	16	1,296	1,278	0.47%	36	36.26	Township
Big Island township	17	1,172	1,191	-0.34%	33	35.25	Township
Marion township	18	1,172	1,194	-0.34%	31	37.54	Township
Waldo township	19	1,130	1,122	0.27%	60	18.85	Township
Green Camp township	20	1,080	1,105	-0.37%	44	24.39	Township
Prospect	21	1,041	1,068	-0.48%	1,438	0.72	Village
Tully township	22	855	807	0.71%	41	21.02	Township
Marion township	23	732	733	0.14%	21	34.17	Township
La Rue	24	665	684	-0.6%	1,391	0.48	Village
Salt Rock township	25	612	611	0.16%	25	24.51	Township
Marion township	26	600	601	-0.17%	25	24.22	Township
Caledonia	27	545	557	-0.37%	2,252	0.24	Village
New Bloomington	28	414	413	0%	941	0.44	Village
Morral	29	369	374	-0.27%	137	2.70	Village
Grand township	30	352	348	0.57%	19	18.19	Township
Waldo	31	312	321	-0.64%	481	0.65	Village
Green Camp	32	300	309	-0.66%	888	0.34	Village

Marion County Cities Summary

Marion township is the largest city in Marion County, with a population of 43,802.