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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of San Marcos. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for San Marcos, California is approximatly 54977.
Racial profile for San Marcos:
| White : | 37051 |
| Black : | 1099 |
| Native American : | 453 |
| Asian : | 2567 |
| Pacific Islander : | 130 |
| Other : | 11212 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in San Marcos, California :
| 18 - 19 : | 777 |
| 20 : | 389 |
| 21 : | 419 |
| 22 - 24 : | 1106 |
| 25 - 29 : | 2088 |
| 30 - 34 : | 2479 |
| 35 - 39 : | 2364 |
| 40 - 44 : | 2151 |
| 45 - 49 : | 1636 |
| 50 - 54 : | 1304 |
| 55 - 59 : | 939 |
| 60 - 61 : | 282 |
| 62 - 64 : | 410 |
| 65 - 66 : | 229 |
| 67 - 69 : | 409 |
| 70 - 74 : | 636 |
| 75 - 79 : | 653 |
| 80 - 84 : | 435 |
| 85+ : | 310 |
Population by age for females in San Marcos, California :
| 18 - 19 : | 679 |
| 20 : | 404 |
| 21 : | 336 |
| 22 - 24 : | 1076 |
| 25 - 29 : | 2116 |
| 30 - 34 : | 2312 |
| 35 - 39 : | 2324 |
| 40 - 44 : | 1910 |
| 45 - 49 : | 1698 |
| 50 - 54 : | 1367 |
| 55 - 59 : | 1034 |
| 60 - 61 : | 347 |
| 62 - 64 : | 500 |
| 65 - 66 : | 324 |
| 67 - 69 : | 495 |
| 70 - 74 : | 893 |
| 75 - 79 : | 865 |
| 80 - 84 : | 653 |
| 85+ : | 623 |
The total amount of households in San Marcos, California is 18111. With 54829 people of the population in these households. The average household size is 3.03.
45760 people in San Marcos, California are part of a family. The average family size in San Marcos is 3.46 people.
There are 11381 married families in San Marcos, California.
Number of married families by number of members in the family :
| 0 - 2 : | 2113 | 3 - 4 : | 1419 | 5 : | 746 | 6 - 11 : | 4118 | 12 - 17 : | 2985 |