The map below shows the political leanings of people in and around San Diego 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.
Politics Key
Very liberal
Split evenly
Very conservative
San Diego County tends to be democratic based on voting results in recent elections. Compared to other nearby counties, San Diego County has more democratic voters. Compared to the nation as a whole, San Diego County leans more democratic.
Highly educated populations with bachelor’s degrees or higher tend to vote for more liberal candidates. In San Diego County, 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 County 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 County is 37.3, which is younger than the national median age of 38.1.
Is San Diego County a political battleground? Across all types of political contests in San Diego County, 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.
Nearby Counties
- Riverside County, CA: more conservative voters
- Orange County, CA: more conservative voters
- Imperial County, CA: more liberal voters
- San Bernardino County, CA: more conservative voters
- Los Angeles County, CA: more liberal voters
- Ventura County, CA: more liberal voters
- Yuma County, AZ: more conservative voters
- La Paz County, AZ: more conservative voters
- Kern County, CA: more conservative voters
- Santa Barbara County, CA: more liberal voters
Counties with Similar Populations
- Orange County, CA: more conservative voters
- Miami-Dade County, FL: more conservative voters
- Kings County, NY: more liberal voters
- Dallas County, TX: more liberal voters
- Maricopa County, AZ: more conservative voters
- Riverside County, CA: more conservative voters
- Queens County, NY: more liberal voters
- San Bernardino County, CA: more conservative voters
- Clark County, NV: more conservative voters
- King County, WA: more liberal voters
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