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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Lake San Marcos. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Lake San Marcos, California is approximatly 4138.
Racial profile for Lake San Marcos:
| White : | 3884 |
| Black : | 11 |
| Native American : | 6 |
| Asian : | 72 |
| Pacific Islander : | 5 |
| Other : | 102 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Lake San Marcos, California :
| 18 - 19 : | 9 |
| 20 : | 8 |
| 21 : | 6 |
| 22 - 24 : | 21 |
| 25 - 29 : | 39 |
| 30 - 34 : | 50 |
| 35 - 39 : | 49 |
| 40 - 44 : | 82 |
| 45 - 49 : | 60 |
| 50 - 54 : | 77 |
| 55 - 59 : | 87 |
| 60 - 61 : | 51 |
| 62 - 64 : | 64 |
| 65 - 66 : | 51 |
| 67 - 69 : | 104 |
| 70 - 74 : | 224 |
| 75 - 79 : | 300 |
| 80 - 84 : | 238 |
| 85+ : | 147 |
Population by age for females in Lake San Marcos, California :
| 18 - 19 : | 15 |
| 20 : | 5 |
| 21 : | 7 |
| 22 - 24 : | 23 |
| 25 - 29 : | 24 |
| 30 - 34 : | 46 |
| 35 - 39 : | 69 |
| 40 - 44 : | 70 |
| 45 - 49 : | 83 |
| 50 - 54 : | 131 |
| 55 - 59 : | 150 |
| 60 - 61 : | 55 |
| 62 - 64 : | 113 |
| 65 - 66 : | 77 |
| 67 - 69 : | 114 |
| 70 - 74 : | 337 |
| 75 - 79 : | 422 |
| 80 - 84 : | 252 |
| 85+ : | 234 |
The total amount of households in Lake San Marcos, California is 2269. With 4100 people of the population in these households. The average household size is 1.81.
2980 people in Lake San Marcos, California are part of a family. The average family size in Lake San Marcos is 2.29 people.
There are 168 married families in Lake San Marcos, California.
Number of married families by number of members in the family :
| 0 - 2 : | 30 | 3 - 4 : | 18 | 5 : | 8 | 6 - 11 : | 61 | 12 - 17 : | 51 |