The 2021 Nassau County Legislature Election was held on November 2, 2021, to elect the 19 legislators in Nassau County, New York, one from each of the county's legislative districts. The elections coincided with the county executive and district attorney elections well as other elections to various cities, towns, and villages.
The Republican Party gained one seat, increasing their majority from 11–8 to 12–7.
Results summary
Countywide Nassau County, New York Legislature Election, 2021PartyVotesPercentageSeats+/–Republican143,44758.73%12 1Democratic109,68741.21%7 1Write-in1680.06%0Totals278,888100.00%19
District Results of the 2021 Nassau County Legislature election by district:
DistrictRepublicanDemocraticOthersTotalResult Votes % Votes % Votes % Votes %11 1,373 14.61% 8,026 85.38% 1 0.01% 9,400 100.00% Democratic hold22 1,147 16.45% 5,818 83.45% 7 0.10% 6,972 100.00% Democratic hold33 2,940 29.40% 7,041 70.42% 18 0.18% 9,999 100.00% Democratic hold44 10,940 67.66% 5,220 32.28% 9 0.06% 16,169 100.00% Republican hold55 4,921 40.03% 7,348 59.77% 24 0.20% 12,293 100.00% Democratic hold66 9,209 58.26% 6,595 41.72% 3 0.02% 15,807 100.00% Republican hold77 11,509 67.20% 5,614 32.78% 4 0.02% 17,127 100.00% Republican hold88 10,422 70.29% 4,396 29.65% 9 0.06% 14,827 100.00% Republican hold99 10,400 69.01% 4,666 30.96% 4 0.03% 15,070 100.00% Republican hold1010 7,723 53.22% 6,779 46.71% 10 0.07% 14,512 100.00% Republican gain1111 5,422 35.73% 9,741 64.19% 12 0.08% 15,175 100.00% Democratic hold1212 14,524 77.05% 4,322 22.93% 5 0.03% 18,851 100.00% Republican hold1313 11,477 66.20% 5,954 33.76% 7 0.04% 17,638 100.00% Republican hold1414 11,143 71.38% 4,459 28.57% 8 0.05% 15,610 100.00% Republican hold1515 10.742 72.39% 4,096 27.60% 2 0.01% 14,840 100.00% Republican hold1616 7,323 48.61% 7,728 51.29% 15 0.10% 15,066 100.0% Democratic hold1717 11,672 74.88% 3,912 25.10% 4 0.03% 15,588 100.00% Republican hold1818 7,515 49.21% 7,736 50.66% 20 0.13% 15,271 100.00% Democratic hold1919 13,184 70.60% 5,438 29.36% 6 0.03% 18,673 100.00% Republican holdTotal 163,786 58.73% 114,934 41.21% 168 0.06% 278,888 100.00%
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