Indiana Voting-age Population By County in 2021 (ACS-5Yrs)

Updated on February 28, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the voting-age population of Indiana was 5.16M which was 76.42% of the total Indiana population. Among all Indiana counties, Marion had the highest voting-age population (728.63K), followed by Lake (378.95K), and Allen (283.32K).

On the other hand, the counties with the least voting-age population were: Ohio (4.77K), Union (5.61K), and Benton (6.51K).

The chart and table below shows the voting-age population of each county and the percentage of each county's population that are of voting-age.

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

Related Topics: Indiana ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates, 2021 Census.

Indiana Voting-age Population By County in 2021

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County	Voting-age Population	% of County Population
Adams	24398	68.37
Allen	283322	74.20
Bartholomew	62052	75.90
Benton	6507	74.91
Blackford	9426	77.65
Boone	51534	73.79
Brown	12764	82.65
Carroll	15774	77.75
Cass	29145	76.86
Clark	93071	77.44
Clay	20228	76.63
Clinton	24286	73.57
Crawford	8208	78.09
Daviess	23388	70.27
Dearborn	39145	77.52
Decatur	20132	76.07
DeKalb	32544	75.58
Delaware	91825	81.64
Dubois	32794	75.43
Elkhart	149162	72.30
Fayette	18220	77.89
Floyd	61487	77.25
Fountain	12781	77.83
Franklin	17468	76.72
Fulton	15551	76.23
Gibson	25068	75.93
Grant	52773	79.00
Greene	24164	78.14
Hamilton	250337	73.28
Hancock	60145	76.51
Harrison	30686	77.66
Hendricks	129176	75.06
Henry	38686	79.18
Howard	64154	76.97
Huntington	28639	78.31
Jackson	34581	75.26
Jasper	25320	76.71
Jay	15391	74.82
Jefferson	26234	79.50
Jennings	21182	76.69
Johnson	120255	75.28
Knox	28480	78.32
Kosciusko	60928	76.02
LaGrange	27003	67.36
Lake	378947	76.41
LaPorte	87971	78.42
Lawrence	35284	78.18
Madison	101804	78.29
Marion	728632	75.15
Marshall	34570	74.87
Martin	7646	77.35
Miami	28447	78.80
Monroe	118071	84.22
Montgomery	29285	77.13
Morgan	55122	77.21
Newton	10889	78.54
Noble	35690	75.47
Ohio	4767	80.37
Orange	15244	77.18
Owen	16741	78.67
Parke	12767	78.25
Perry	15108	78.89
Pike	9621	78.73
Porter	134349	77.95
Posey	19644	77.64
Pulaski	9751	78.03
Putnam	29558	80.24
Randolph	18937	76.73
Ripley	22030	76.09
Rush	12861	76.98
St. Joseph	207594	76.31
Scott	18761	77.24
Shelby	34529	77.03
Spencer	15589	78.14
Starke	17781	76.40
Steuben	27281	79.35
Sullivan	16546	79.50
Switzerland	7442	75.40
Tippecanoe	147623	79.38
Tipton	12105	79.17
Union	5612	79.07
Vanderburgh	140574	78.23
Vermillion	12054	77.88
Vigo	84607	79.43
Wabash	24646	79.20
Warren	6579	78.04
Warrick	48351	76.05
Washington	21557	76.92
Wayne	51734	77.69
Wells	21138	75.22
White	18836	76.59
Whitley	26164	76.84