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Johnson County Auditor
Commissioner of Elections
and Voter Registration


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Tom Slockett, Auditor

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Voter Registration Statistics by Age, Gender and Party

Updated November 13, 2009.
County Total: 88,211

Dem 41,490 (47.03%)

Rep 16,626 (18.85%)

Green 73 (0.08%) Libertarian 123 (0.14%)

None 29,899 (33.89%)

Voter Registration Statistics Main Page

County Wide Totals

Age Dem F Dem M Dem Tot Rep F Rep M Rep Tot Green F Green M Green Tot Libt F Libt M Libt Tot None F None M None Tot F Tot M Tot TOTAL %D %R %N
18-24 4,836 3,605 8,441 1,638 1,924 3,562 13 17 30 21 59 80 4,330 4,335 8,665 10,838 9,940 20,778 40.62% 17.14% 41.70%
25-29 2,865 2,284 5,149 783 1,088 1,871 6 9 15 4 16 20 2,384 2,478 4,862 6,042 5,875 11,917 43.21% 15.70% 40.80%
30-49 6,817 5,235 12,052 2,266 2,966 5,232 8 9 17 7 13 20 4,624 4,985 9,609 13,722 13,208 26,930 44.75% 19.43% 35.68%
50-64 5,743 4,427 10,170 1,569 1,896 3,465 4 5 9 0 3 3 2,356 2,535 4,891 9,672 8,866 18,538 54.86% 18.69% 26.38%
65+ 3,295 2,382 5,677 1,357 1,138 2,495 1 1 2 0 0 0 992 880 1,872 5,645 4,401 10,046 56.51% 24.84% 18.63%
TOTAL 23,556 17,933 41,489 7,613 9,012 16,625 32 41 73 32 91 123 14,686 15,213 29,899 45,919 42,290 88,209 47.03% 18.85% 33.90%

Iowa City Only

Iowa City age statistics

Age Dem F Dem M Dem Tot Rep F Rep M Rep Tot Green F Green M Green Tot Libt F Libt M Libt Tot None F None M None Tot F Tot M Tot TOTAL %D %R %N
18-24 3,885 2,877 6,762 1,254 1,446 2,700 13 15 28 17 54 71 3,411 3,496 6,907 8,580 7,888 16,468 41.06% 16.40% 41.94%
25-29 1,702 1,471 3,173 363 602 965 4 6 10 3 13 16 1,305 1,481 2,786 3,377 3,573 6,950 45.65% 13.88% 40.09%
30-49 3,430 2,723 6,153 738 1,010 1,748 4 3 7 1 7 8 1,673 2,069 3,742 5,846 5,812 11,658 52.78% 14.99% 32.10%
50-64 2,875 2,195 5,070 561 678 1,239 3 4 7 0 2 2 897 1,011 1,908 4,336 3,890 8,226 61.63% 15.06% 23.19%
65+ 1,804 1,181 2,985 735 553 1,288 1 1 2 0 0 0 479 405 884 3,019 2,140 5,159 57.86% 24.97% 17.14%
TOTAL 13,696 10,447 24,143 3,651 4,289 7,940 25 29 54 21 76 97 7,765 8,462 16,227 25,158 23,303 48,461 49.82% 16.38% 33.48%

Voting Age Population, Countywide (Census Estimates as of July 1, 2007)

Age Population Registered %
18-24 26,426 20,778 78.63%
25-64 63,330 57,385 90.61%
65+ 9,980 10,046 100.66%
Voting Age Total 99,736 88,209 88.44%

Note: Statistics by age may not exactly match other voter registration statistics, as the reports are run at slightly different times and activity on the statewide voter registration system is constant.


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Phone: (319) 356-6004 FAX: (319) 356-6086
Mailing address: 913 S. Dubuque St., Suite 101, Iowa City, IA 52240