The map below shows the political leanings of people in and around Nassau County. Darker red areas have almost entirely Republican voters, dark blue areas vote mostly for Democrats, and areas in lighter shades or in light purple are areas where the vote is usually split between parties.

Nassau County, NY map of Democratic vs. Republican areas

Politics Key

Very liberal
Split evenly
Very conservative


Nassau County tends to be slightly democratic based on voting results in recent elections. Compared to other nearby counties, Nassau County has more republican voters. Compared to the nation as a whole, Nassau County leans more democratic.

Highly educated populations with bachelor’s degrees or higher tend to vote for more liberal candidates. In Nassau County, 45.17% of all adults have earned a bachelor’s degree or higher. Educated women are far less likely to vote for conservatives, and in Nassau County women make up 51.39% of the population.

Older Americans tend to vote more conservatively. Members of the Boomer and Silent generations (born 1928-1964) more often vote for republicans while GenX, Millennials (born 1965-1996) and younger generations consistently support democrats. The median age in Nassau County is 42.0, which is older than the national median age of 38.1.

Is Nassau County a political battleground? Across all types of political contests in Nassau County, including state, local and presidential elections, races come within five percentage points 24% of the time.

Note: Federal, local, and state elections are weighed based on the recency of the election and the importance most voters assign to each seat.

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