Suffolk County Historical Household and Family Data
ACS 2010-2014 data
Total population: 1,500,373
| Suffolk County | New York | U.S. | |
| Total Households | 496,780, 100% | 7,255,528 | 116,211,092 |
| Average Household Size | 2.96, see rank | 2.62 | 2.63 |
| 1 Person Households | 103,147, 20.76%, see rank | 29.55% | 27.57% |
| 2 or More Person Households | 393,633, 79.24%, see rank | 70.45% | 72.43% |
| Family Households (Families) | 372,094, 74.90%, see rank | 63.90% | 66.22% |
| Average Family Size | 3.53, see rank | 3.38 | 3.32 |
| Married-Couple Family | 288,190, 58.01%, see rank | 44.12% | 48.42% |
| Nonfamily Households | 124,686, 25.10%, see rank | 36.10% | 33.78% |
US Census 2010 data
Total population: 1,493,350
| Suffolk County | New York | U.S. | |
| Total Households | 499,922, 100% | 7,317,755 | 116,716,292 |
| Average Household Size | 2.93, see rank | 2.57 | 2.58 |
| 1 Person Households | 102,900, 20.58%, see rank | 29.12% | 26.74% |
| 2 or More Person Households | 397,022, 79.42%, see rank | 70.88% | 73.26% |
| Family Households (Families) | 370,897, 74.19%, see rank | 63.54% | 66.43% |
| Average Family Size | 3.36, see rank | 3.20 | 3.14 |
| Married-Couple Family | 287,935, 57.60%, see rank | 43.63% | 48.42% |
| Nonfamily Households | 129,025, 25.81%, see rank | 36.46% | 33.57% |
ACS 2008-2012 data
Total population: 1,492,360
| Suffolk County | New York | U.S. | |
| Total Households | 496,349, 100% | 7,230,896 | 115,226,802 |
| Average Household Size | 2.94, see rank | 2.60 | 2.61 |
| 1 Person Households | 98,919, 19.93%, see rank | 29.31% | 27.45% |
| 2 or More Person Households | 397,430, 80.07%, see rank | 70.69% | 72.55% |
| Family Households (Families) | 374,995, 75.55%, see rank | 64.26% | 66.47% |
| Average Family Size | 3.49, see rank | 3.35 | 3.29 |
| Married-Couple Family | 292,459, 58.92%, see rank | 44.60% | 48.97% |
| Nonfamily Households | 121,354, 24.45%, see rank | 35.74% | 33.53% |
ACS 2006-2010 data
Total population: 1,482,548
| Suffolk County | New York | U.S. | |
| Total Households | 495,289, 100% | 7,205,740 | 114,235,996 |
| Average Household Size | 2.93, see rank | 2.59 | 2.59 |
| 1 Person Households | 97,327, 19.65%, see rank | 29.08% | 27.24% |
| 2 or More Person Households | 397,962, 80.35%, see rank | 70.92% | 72.76% |
| Family Households (Families) | 374,930, 75.70%, see rank | 64.62% | 66.75% |
| Average Family Size | 3.47, see rank | 3.31 | 3.25 |
| Married-Couple Family | 297,736, 60.11%, see rank | 45.20% | 49.60% |
| Nonfamily Households | 120,359, 24.30%, see rank | 35.38% | 33.25% |
ACS 2005-2009 data
Total population: 1,511,028
| Suffolk County | New York | U.S. | |
| Total Households | 478,858, 100% | 7,137,013 | 112,611,029 |
| Average Household Size | 3.09, see rank | 2.64 | 2.60 |
| 1 Person Households | 94,952, 19.83%, see rank | 29.48% | 27.32% |
| 2 or More Person Households | 383,906, 80.17%, see rank | 70.52% | 72.68% |
| Family Households (Families) | 362,602, 75.72%, see rank | 64.46% | 66.67% |
| Average Family Size | 3.66, see rank | 3.40 | 3.27 |
| Married-Couple Family | 290,791, 60.73%, see rank | 45.27% | 49.71% |
| Nonfamily Households | 116,256, 24.28%, see rank | 35.54% | 33.33% |
US Census 2000 data
Total population: 1,419,369
| Suffolk County | New York | U.S. | |
| Total Households | 469,299, 100% | 7,056,860 | 105,480,101 |
| Average Household Size | 2.96, see rank | 2.61 | 2.59 |
| 1 Person Households | 85,993, 18.32%, see rank | 28.10% | 25.82% |
| 2 or More Person Households | 383,306, 81.68%, see rank | 71.90% | 74.18% |
| Family Households (Families) | 360,422, 76.80%, see rank | 65.74% | 68.06% |
| Average Family Size | 3.36, see rank | 3.22 | 3.14 |
| Married-Couple Family | 291,098, 62.03%, see rank | 46.61% | 51.66% |
| Nonfamily Households | 108,877, 23.20%, see rank | 34.26% | 31.94% |
* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.