Camp Pendleton Mainside, California
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | −33.0% |
| 2008 | −20.3% |
| 2012 | −26.6% |
| 2016 | −26.0% |
| 2020 | −6.8% |
| 2024 | −34.7% |
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| R | 31.5%Harris145 | 66.2%Trump305 | 2.4% | R+34.7 | R+27.9 | R+33.2 | 461 | |
| R | 43.5%Biden191 | 50.3%Trump221 | 6.2% | R+6.8 | D+19.2 | R+11.3 | 439 | |
| R | 32.0%Clinton64 | 58.0%Trump116 | 10.0% | R+26.0 | D+0.6 | R+28.1 | 200 | |
| R | 35.4%Obama96 | 62.0%Romney168 | 2.6% | R+26.6 | R+6.3 | R+30.4 | 271 | |
| R | 39.4%Obama161 | 59.7%McCain244 | 1.0% | R+20.3 | D+12.7 | R+27.6 | 409 | |
| R | 31.5%Kerry129 | 64.5%Bush264 | 3.9% | R+33.0 | — | R+30.5 | 409 |
Camp Pendleton Mainside is a census-designated place entirely within the Marine Corps base, meaning its resident population skews heavily toward active-duty personnel and their families — a demographic profile that sets it apart from surrounding San Diego and Orange County communities.
Across the recorded series it reached a Republican high of 34.7 points in 2024. Between 2020 and 2024 the city moved 27.9 points toward the Republican candidate; the 2024 margin was 34.7 points.
A population of 9,501, a 41% non-Hispanic-white share, and a median household income of $61,575 describe the city. The city's voting pattern over the last decade is most similar to that of Camp Pendleton South and Fort Lewis.
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
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Camp Pendleton Mainside, California. Akashic. https://akashic.app/city/0610554/. Accessed May 20, 2026. License: CC BY 4.0.