Indiana Citizen Population By County in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen population for Indiana was 6,484,670 and represented 96.83% of the total Indiana population.

Among all Indiana counties, Marion had the highest citizen population (895.14K), followed by Lake (471.78K), and Allen (362.41K).

In terms of percentages, Crawford had the highest percentage of its population being citizens (100.00%), followed by Switzerland (100.00%), and Martin (99.90%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

You may also be interested in:
Indiana Citizen Voting-age Population By County in 2020

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Indiana Citizen Population By County in 2020

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County	Citizen Population	% of County Population
Marion	895140	93.50
Lake	471775	97.08
Allen	362410	96.51
Hamilton	316925	95.91
St. Joseph	260670	96.23
Elkhart	194890	94.98
Vanderburgh	178325	98.22
Tippecanoe	176390	91.25
Porter	166915	98.49
Hendricks	163560	98.06
Johnson	152775	97.84
Monroe	138820	94.23
Madison	127985	98.84
Clark	114850	97.82
Delaware	112970	98.70
LaPorte	108145	98.29
Vigo	105165	98.01
Howard	81740	99.10
Floyd	77045	98.93
Kosciusko	76625	96.80
Bartholomew	76100	91.38
Hancock	75855	99.01
Morgan	69605	99.24
Grant	65545	99.23
Boone	65215	97.52
Wayne	65090	98.36
Warrick	61250	97.83
Dearborn	49355	99.49
Henry	48050	99.77
Noble	45980	96.52
Lawrence	45215	99.27
Marshall	44740	96.56
Shelby	43725	98.13
DeKalb	43035	99.63
Jackson	42305	95.98
Dubois	41060	96.53
Harrison	39900	99.34
LaGrange	39110	98.93
Montgomery	37560	98.08
Putnam	36470	97.46
Knox	36455	98.97
Huntington	36000	99.04
Cass	35555	94.25
Adams	35350	99.45
Miami	35275	98.85
Steuben	34235	98.97
Whitley	33735	99.51
Gibson	33220	98.55
Jasper	32980	98.64
Daviess	32660	98.15
Greene	31980	99.39
Jefferson	31930	99.27
Wabash	30965	99.25
Clinton	30345	94.28
Ripley	28275	99.37
Washington	27890	99.82
Wells	27830	99.36
Jennings	27495	99.48
Decatur	26270	98.82
Clay	26145	99.68
Posey	25410	99.73
Randolph	24285	98.34
Scott	23640	99.39
White	23380	96.75
Fayette	22925	99.37
Starke	22845	99.35
Franklin	22665	99.63
Owen	20740	99.45
Sullivan	20610	99.83
Jay	20560	99.35
Spencer	20240	99.39
Carroll	19885	98.76
Fulton	19660	97.96
Orange	19460	99.54
Perry	19015	99.61
Parke	16840	99.59
Rush	16560	99.58
Fountain	16300	99.06
Vermillion	15370	99.26
Brown	15030	99.57
Tipton	15005	99.01
Newton	13640	97.57
Pulaski	12375	99.16
Pike	12325	99.68
Blackford	11850	99.37
Switzerland	10725	100.00
Crawford	10580	100.00
Martin	10160	99.90
Benton	8595	98.85
Warren	8210	99.88
Union	7025	98.39
Ohio	5870	99.66