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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Portsmouth. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Portsmouth, New Hampshire is approximatly 20784.
Racial profile for Portsmouth:
| White : | 19443 |
| Black : | 442 |
| Native American : | 34 |
| Asian : | 508 |
| Pacific Islander : | 5 |
| Other : | 59 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Portsmouth, New Hampshire :
| 18 - 19 : | 158 |
| 20 : | 77 |
| 21 : | 84 |
| 22 - 24 : | 454 |
| 25 - 29 : | 1048 |
| 30 - 34 : | 1060 |
| 35 - 39 : | 959 |
| 40 - 44 : | 845 |
| 45 - 49 : | 722 |
| 50 - 54 : | 696 |
| 55 - 59 : | 472 |
| 60 - 61 : | 156 |
| 62 - 64 : | 228 |
| 65 - 66 : | 134 |
| 67 - 69 : | 238 |
| 70 - 74 : | 320 |
| 75 - 79 : | 271 |
| 80 - 84 : | 185 |
| 85+ : | 146 |
Population by age for females in Portsmouth, New Hampshire :
| 18 - 19 : | 150 |
| 20 : | 65 |
| 21 : | 81 |
| 22 - 24 : | 426 |
| 25 - 29 : | 973 |
| 30 - 34 : | 921 |
| 35 - 39 : | 929 |
| 40 - 44 : | 791 |
| 45 - 49 : | 781 |
| 50 - 54 : | 753 |
| 55 - 59 : | 549 |
| 60 - 61 : | 176 |
| 62 - 64 : | 281 |
| 65 - 66 : | 174 |
| 67 - 69 : | 291 |
| 70 - 74 : | 472 |
| 75 - 79 : | 427 |
| 80 - 84 : | 332 |
| 85+ : | 394 |
The total amount of households in Portsmouth, New Hampshire is 9875. With 20177 people of the population in these households. The average household size is 2.04.
13390 people in Portsmouth, New Hampshire are part of a family. The average family size in Portsmouth is 2.75 people.
There are 2316 married families in Portsmouth, New Hampshire.
Number of married families by number of members in the family :
| 0 - 2 : | 462 | 3 - 4 : | 269 | 5 : | 131 | 6 - 11 : | 752 | 12 - 17 : | 702 |