CDP in San Diego County, California · 1.7 sq mi · 3,003 people per sq mi
About 5,100 people live in Lake San Marcos. The typical household earns $89,851, and the median resident is 63 years old.
2026 projection
From 3,957 in 2020
Poverty rate 5.98%
Men 60.5 · Women 64.1
2011–2026
5,125
2026 projection
29.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2011–2026
5,125
2026 projection
29.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 5,125 | +43 | 0.85% |
|---|---|---|---|
| 2025 | 5,082 | +86 | 0.86% |
| 2023 | 4,996 | +916 | 22.45% |
| 2022 | 4,080 | -47 | 1.14% |
| 2021 | 4,127 | +170 | 4.30% |
| 2020 | 3,957 | -756 | 16.04% |
| 2019 | 4,713 | -177 | 3.62% |
| 2018 | 4,890 | -34 | 0.69% |
| 2017 | 4,924 | +395 | 8.72% |
| 2016 | 4,529 | -269 | 5.61% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 47 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 17 residents
55% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 55% | 61% | 50% |
| Never married | 21% | 22% | 20% |
| Divorced | 13% | 9% | 17% |
| Widowed | 11% | 8% | 14% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau