Indiana Citizen Population By County in 2015 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen population for Indiana was 6,367,230 and represented 96.93% of the total Indiana population.

Among all Indiana counties, Marion had the highest citizen population (870.56K), followed by Lake (476.04K), and Allen (349.92K).

In terms of percentages, Ohio had the highest percentage of its population being citizens (100.00%), followed by Martin (99.95%), and Pike (99.92%).

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 2015

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

See this for other years:

Indiana Citizen Population By County in 2015

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County	Citizen Population	% of County Population
Marion	870560	93.98
Lake	476035	96.84
Allen	349915	96.28
Hamilton	284920	96.05
St. Joseph	257220	96.25
Elkhart	188030	93.69
Vanderburgh	178635	98.53
Tippecanoe	165250	91.32
Porter	163985	98.45
Hendricks	149830	97.65
Johnson	142625	97.93
Monroe	133625	93.83
Madison	128775	98.85
Delaware	115645	98.56
Clark	110835	97.93
LaPorte	109495	98.40
Vigo	106200	98.09
Howard	81950	99.02
Kosciusko	76060	97.53
Floyd	74620	98.31
Bartholomew	74125	93.25
Hancock	70850	99.33
Morgan	69000	99.42
Grant	68525	99.46
Wayne	66855	98.51
Warrick	60120	98.57
Boone	59400	98.17
Dearborn	49430	99.50
Henry	48905	99.51
Noble	46170	97.11
Lawrence	45490	99.29
Marshall	45375	96.63
Shelby	43725	98.39
DeKalb	42120	99.22
Jackson	41965	96.54
Dubois	40950	96.83
Harrison	39005	99.43
Knox	37920	99.63
LaGrange	37445	98.32
Putnam	37230	98.88
Montgomery	37195	97.45
Huntington	36565	99.19
Miami	36020	99.48
Cass	35860	93.20
Adams	34535	99.70
Steuben	33800	98.64
Gibson	33470	99.41
Whitley	33220	99.67
Jasper	32830	98.15
Greene	32755	99.82
Wabash	32140	99.32
Jefferson	32080	98.85
Daviess	31830	98.21
Clinton	31245	95.16
Ripley	28350	99.09
Jennings	28010	99.63
Washington	27885	99.84
Wells	27585	99.24
Clay	26650	99.87
Decatur	25975	98.99
Posey	25485	99.69
Randolph	25375	99.14
Fayette	23740	99.85
White	23605	96.78
Scott	23555	99.03
Starke	22930	99.20
Franklin	22830	99.54
Owen	21160	99.86
Jay	21105	99.29
Sullivan	21005	99.50
Spencer	20675	99.14
Fulton	20125	98.05
Carroll	19695	98.40
Orange	19595	99.34
Perry	19350	99.67
Parke	17025	99.53
Rush	16945	99.74
Fountain	16720	98.99
Vermillion	15780	99.50
Tipton	15475	99.36
Brown	14950	99.60
Newton	13730	97.69
Pulaski	13000	99.66
Pike	12675	99.92
Blackford	12430	99.64
Crawford	10575	99.86
Switzerland	10420	99.24
Martin	10255	99.95
Benton	8585	98.11
Warren	8330	99.58
Union	7280	99.73
Ohio	6035	100.00