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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of West Islip. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for West Islip, New York is approximatly 28907.
Racial profile for West Islip:
| White : | 28009 |
| Black : | 115 |
| Native American : | 16 |
| Asian : | 316 |
| Pacific Islander : | 3 |
| Other : | 146 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in West Islip, New York :
| 18 - 19 : | 241 |
| 20 : | 134 |
| 21 : | 122 |
| 22 - 24 : | 387 |
| 25 - 29 : | 689 |
| 30 - 34 : | 1016 |
| 35 - 39 : | 1383 |
| 40 - 44 : | 1416 |
| 45 - 49 : | 1012 |
| 50 - 54 : | 800 |
| 55 - 59 : | 708 |
| 60 - 61 : | 251 |
| 62 - 64 : | 309 |
| 65 - 66 : | 173 |
| 67 - 69 : | 308 |
| 70 - 74 : | 448 |
| 75 - 79 : | 269 |
| 80 - 84 : | 161 |
| 85+ : | 101 |
Population by age for females in West Islip, New York :
| 18 - 19 : | 266 |
| 20 : | 113 |
| 21 : | 94 |
| 22 - 24 : | 307 |
| 25 - 29 : | 657 |
| 30 - 34 : | 1124 |
| 35 - 39 : | 1501 |
| 40 - 44 : | 1381 |
| 45 - 49 : | 1016 |
| 50 - 54 : | 847 |
| 55 - 59 : | 772 |
| 60 - 61 : | 250 |
| 62 - 64 : | 364 |
| 65 - 66 : | 209 |
| 67 - 69 : | 338 |
| 70 - 74 : | 502 |
| 75 - 79 : | 376 |
| 80 - 84 : | 304 |
| 85+ : | 333 |
The total amount of households in West Islip, New York is 8883. With 28503 people of the population in these households. The average household size is 3.21.
26347 people in West Islip, New York are part of a family. The average family size in West Islip is 3.47 people.
There are 6947 married families in West Islip, New York.
Number of married families by number of members in the family :
| 0 - 2 : | 1015 | 3 - 4 : | 854 | 5 : | 409 | 6 - 11 : | 2641 | 12 - 17 : | 2028 |