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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, Texas is approximatly 34733.
Racial profile for San Marcos:
| White : | 25200 |
| Black : | 1921 |
| Native American : | 227 |
| Asian : | 426 |
| Pacific Islander : | 38 |
| Other : | 5914 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in San Marcos, Texas :
| 18 - 19 : | 1280 |
| 20 : | 1158 |
| 21 : | 1300 |
| 22 - 24 : | 3058 |
| 25 - 29 : | 2105 |
| 30 - 34 : | 1094 |
| 35 - 39 : | 899 |
| 40 - 44 : | 750 |
| 45 - 49 : | 610 |
| 50 - 54 : | 504 |
| 55 - 59 : | 357 |
| 60 - 61 : | 131 |
| 62 - 64 : | 178 |
| 65 - 66 : | 128 |
| 67 - 69 : | 121 |
| 70 - 74 : | 225 |
| 75 - 79 : | 191 |
| 80 - 84 : | 138 |
| 85+ : | 121 |
Population by age for females in San Marcos, Texas :
| 18 - 19 : | 1999 |
| 20 : | 1595 |
| 21 : | 1534 |
| 22 - 24 : | 2629 |
| 25 - 29 : | 1490 |
| 30 - 34 : | 878 |
| 35 - 39 : | 742 |
| 40 - 44 : | 649 |
| 45 - 49 : | 606 |
| 50 - 54 : | 530 |
| 55 - 59 : | 429 |
| 60 - 61 : | 155 |
| 62 - 64 : | 221 |
| 65 - 66 : | 140 |
| 67 - 69 : | 199 |
| 70 - 74 : | 345 |
| 75 - 79 : | 341 |
| 80 - 84 : | 234 |
| 85+ : | 324 |
The total amount of households in San Marcos, Texas is 12660. With 29205 people of the population in these households. The average household size is 2.31.
16602 people in San Marcos, Texas are part of a family. The average family size in San Marcos is 3.08 people.
There are 2746 married families in San Marcos, Texas.
Number of married families by number of members in the family :
| 0 - 2 : | 581 | 3 - 4 : | 361 | 5 : | 161 | 6 - 11 : | 867 | 12 - 17 : | 776 |