Kansas 2020 Census Total Voting-age Population (18yrs and over) By County

Updated on August 21, 2023.

According to the data from the US 2020 decennial Census, as at April 2020, the total Voting-age population (18 years and over) of Kansas was 2,229,316, which was 75.88% of the total Kansas population.

Johnson County had the highest voting-age population (461,998), followed by Sedgwick County (392,877), and then Shawnee County (137,135). On the other hand, the 3 counties with low voting-age population were: Greeley County (956), Wallace County (1,124), and Lane County (1,237).

You can also see this information for other states and also for the US by state.

Hover over or click on the counties to see the number and percentage of Kansas population that lives in each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can also see the voting-age population by county for the different racial groups as well as the different ethnicities in Kansas.

Kansas 2020 Census Total Voting-age Population By County
Kansas 2020 Census Total Voting-age Population By County
County
Voting-age Population
% of Kansas Pop.
Johnson 461,998 20.72
Sedgwick 392,877 17.62
Shawnee 137,135 6.15
Wyandotte 123,572 5.54
Douglas 96,316 4.32
Leavenworth 62,172 2.79
Riley 59,685 2.68
Butler 50,070 2.25
Reno 48,143 2.16
Saline 41,737 1.87
Crawford 30,158 1.35
Finney 27,176 1.22
Cowley 26,392 1.18
Geary 25,963 1.17
Harvey 25,911 1.16
Miami 25,740 1.16
Lyon 25,093 1.13
Montgomery 24,064 1.08
Ford 23,674 1.06
McPherson 23,584 1.06
Ellis 22,952 1.03
Franklin 19,927 0.89
Barton 19,337 0.87
Pottawatomie 17,895 0.80
Sumner 16,920 0.76
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