The map below shows the political leanings of people in and around San Diego. 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.

San Diego, CA map of Democratic vs. Republican areas

Politics Key

Very liberal
Split evenly
Very conservative


San Diego tends to be democratic based on voting results in recent elections. Compared to other nearby cities, San Diego has more republican voters. Compared to the nation as a whole, San Diego leans more democratic.

Highly educated populations with bachelor’s degrees or higher tend to vote for more liberal candidates. In the San Diego metro area, 36.90% of all adults have earned a bachelor’s degree or higher. Educated women are far less likely to vote for conservatives, and in San Diego women make up 49.68% 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 San Diego is 37.3, which is younger than the national median age of 38.1.

Is San Diego a political battleground? Across all types of political contests in San Diego, including state, local and presidential elections, races come within five percentage points 21% 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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