The 2025 Nassau County Legislature election was held on November 4, 2025, to elect the 19 legislators in Nassau County, New York, one from each of the county's legislative districts. The elections coincided with other elections in the county and state.
The Republican Party maintained their majority from the 2023 election, but lost a seat.
Results Prior to the election, the Westchester County Supreme Court issued a ruling declaring the previous legislature map to be void as it disproportionally benefitted the Republican Party. A new map was made, redrawing multiple districts and helping the Democrats gain the 14th district.
Countywide 2025 Nassau County, New York, Legislature electionPartyVotesPercentageSeats+/–Republican167,30254.90%11 1Democratic137,28645.05%8 1Write-in1670.05%0Totals304,755100.00%19
By district
DistrictRepublicanDemocraticOthersTotalResult Votes % Votes % Votes % Votes %1 4,735 33.27% 9,490 66.68% 8 0.06% 14,233 100.00% Democratic hold2 3,126 32.46% 6,499 67.49% 5 0.05% 9,630 100.00% Democratic hold3 4,359 33.56% 8,617 66.35% 12 0.09% 12,988 100.00% Democratic hold4 11,381 59.99% 7,568 39.89% 23 0.12% 18,972 100.00% Republican hold5 4,510 42.33% 6,140 57.63% 4 0.04% 10,654 100.00% Democratic hold6 4,224 33.80% 8,264 66.13% 8 0.06% 12,496 100.00% Democratic hold7 12,256 75.95% 3,872 24.00% 8 0.05% 16,136 100.00% Republican hold8 11,823 65.51% 6,217 34.45% 9 0.05% 18,049 100.00% Republican hold9 9,092 55.32% 7,331 44.61% 11 0.07% 16,434 100.00% Republican hold10 11,520 63.33% 6,661 36.62% 9 0.05% 18,190 100.00% Republican hold11 6,808 37.24% 11,463 62.70% 11 0.06% 18,282 100.00% Democratic hold12 11,535 58.18% 8,284 41.78% 9 0.05% 19,828 100.00% Republican hold13 10,066 61.60% 6,269 38.37% 5 0.03% 16,340 100.00% Republican hold14 6,846 44.88% 8,390 55.00% 18 0.12% 15,254 100.00% Democratic gain15 13,283 68.37% 6,139 31.60% 5 0.03% 19,427 100.00% Republican hold16 7,807 46.75% 8,877 53.16% 14 0.08% 16,698 100.00% Democratic hold17 10,187 66.03% 5,234 33.93% 6 0.04% 15,427 100.00% Republican hold18 9,430 59.04% 6,533 40.91% 8 0.05% 15,971 100.00% Republican hold19 14,314 72.49% 5,428 27.49% 4 0.02% 19,746 100.00% Republican holdTotal 167,302 54.90% 137,286 45.05% 167 0.05% 304,755 100.00%
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