| | Lakeside (San Diego County), CA | Raymore, MO | United States |
| Population | 21,383 | 22,722 | 329,725,481 |
| Female Population | 52.1% | 50.6% | 50.5% |
| Male Population | 47.9% | 49.4% | 49.5% |
| Median Age | 39.3 | 40.8 | 38.4 |
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| Population - 2010 | 20,505 | 19,297 | 309,327,143 |
| Population - 2000 | 19,560 | 11,146 | 285,036,114 |
| Population - 1990 | 39,412 | 5,592 | 251,960,433 |
| Pop. 2000 to Now | 13.3% | 102.2% | 15.6% |
| Pop. 1990 to Now | -43.8% | 302.9% | 30.8% |
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| Population Density | 3,086.0 | 1,312.5 | 93.4 |
| Land Area | 6.9 | 17.3 | 3,531,905.4 |
| Water Area | 0.3 | 0.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Lakeside (San Diego County), CA | Raymore, MO | United States |
| Age 0 to 4 | 5.8% | 5.9% | 5.9% |
| Age 5 to 9 | 6.9% | 7.1% | 6.1% |
| Age 10 to 14 | 6.5% | 8.0% | 6.6% |
| Age 15 to 17 | 4.6% | 5.7% | 3.9% |
| Age 18 to 20 | 3.6% | 3.3% | 4.0% |
| Age 21 to 24 | 6.8% | 2.2% | 5.2% |
| Age 25 to 34 | 11.1% | 9.8% | 13.8% |
| Age 35 to 44 | 12.2% | 15.0% | 12.9% |
| Age 45 to 54 | 11.6% | 11.9% | 12.6% |
| Age 55 to 59 | 6.2% | 5.5% | 6.7% |
| Age 60 to 64 | 6.4% | 7.4% | 6.3% |
| Age 65 to 74 | 10.7% | 9.0% | 9.6% |
| Age 75 to 84 | 5.7% | 5.1% | 4.5% |
| Age 85 and over | 1.9% | 4.1% | 1.9% |
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| Race | | | |
| | Lakeside (San Diego County), CA | Raymore, MO | United States |
| White | 67.2% | 77.4% | 59.4% |
| Black | 2.3% | 10.3% | 12.2% |
| Asian | 2.4% | 1.5% | 5.6% |
| Native American | 0.5% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.6% | 0.1% | 0.2% |
| Other | 0.6% | 0.2% | 0.4% |
| Two or More Races | 4.6% | 4.3% | 3.2% |
| Hispanic | 21.8% | 6.1% | 18.4% |
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| Marriage & Family | | | |
| | Lakeside (San Diego County), CA | Raymore, MO | United States |
| Married Population | 50.5% | 59.9% | 49.8% |
| Currently Married | 49.2% | 59.2% | 48.0% |
| Married but Separated | 1.3% | 0.7% | 1.8% |
| Single Population | 49.5% | 40.1% | 50.2% |
| Never Married | 30.6% | 21.9% | 33.8% |
| Divorced | 10.4% | 9.5% | 10.8% |
| Widowed | 8.4% | 8.7% | 5.6% |
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| Household Size | 2.93 | 2.63 | 2.60 |
| Households | 7,234 | 8,557 | 124,010,992 |
| Family Households | 5,175 | 6,312 | 80,755,759 |
| Married couple, w/children | 32.6% | 36.4% | 30.5% |
| Married couple, no children | 41.4% | 46.1% | 42.9% |
| Non Family Households | 2,059 | 2,245 | 43,255,233 |
| Single householder, w/children | 14.1% | 11.7% | 15.8% |
| Single householder, no children | 11.9% | 5.9% | 10.8% |