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Portsmouth, NH Historical Household and Family Data
ACS 2010-2014 data
Total population: 21,366
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 10,325, 100% | 519,580 | 116,211,092 |
| Average Household Size | 2.00, see rank | 2.46 | 2.63 |
| 1 Person Households | 4,279, 41.44%, see rank | 25.40% | 27.57% |
| 2 or More Person Households | 6,046, 58.56%, see rank | 74.60% | 72.43% |
| Family Households (Families) | 4,770, 46.20%, see rank | 66.83% | 66.22% |
| Average Family Size | 2.83, see rank | 3.05 | 3.32 |
| Married-Couple Family | 3,866, 37.44%, see rank | 52.95% | 48.42% |
| Nonfamily Households | 5,555, 53.80%, see rank | 33.17% | 33.78% |
US Census 2010 data
Total population: 20,779
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 10,014, 100% | 518,973 | 116,716,292 |
| Average Household Size | 2.03, see rank | 2.46 | 2.58 |
| 1 Person Households | 3,923, 39.18%, see rank | 25.64% | 26.74% |
| 2 or More Person Households | 6,091, 60.82%, see rank | 74.36% | 73.26% |
| Family Households (Families) | 4,736, 47.29%, see rank | 66.32% | 66.43% |
| Average Family Size | 2.75, see rank | 2.96 | 3.14 |
| Married-Couple Family | 3,556, 35.51%, see rank | 52.15% | 48.42% |
| Nonfamily Households | 5,278, 52.71%, see rank | 33.68% | 33.57% |
ACS 2008-2012 data
Total population: 21,140
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 10,058, 100% | 516,845 | 115,226,802 |
| Average Household Size | 2.04, see rank | 2.47 | 2.61 |
| 1 Person Households | 3,995, 39.72%, see rank | 25.24% | 27.45% |
| 2 or More Person Households | 6,063, 60.28%, see rank | 74.76% | 72.55% |
| Family Households (Families) | 4,695, 46.68%, see rank | 67.19% | 66.47% |
| Average Family Size | 2.83, see rank | 3.05 | 3.29 |
| Married-Couple Family | 3,703, 36.82%, see rank | 53.67% | 48.97% |
| Nonfamily Households | 5,363, 53.32%, see rank | 32.81% | 33.53% |
ACS 2006-2010 data
Total population: 20,963
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 9,927, 100% | 513,804 | 114,235,996 |
| Average Household Size | 2.07, see rank | 2.48 | 2.59 |
| 1 Person Households | 3,752, 37.80%, see rank | 25.00% | 27.24% |
| 2 or More Person Households | 6,175, 62.20%, see rank | 75.00% | 72.76% |
| Family Households (Families) | 4,709, 47.44%, see rank | 67.37% | 66.75% |
| Average Family Size | 2.86, see rank | 3.05 | 3.25 |
| Married-Couple Family | 3,555, 35.81%, see rank | 54.16% | 49.60% |
| Nonfamily Households | 5,218, 52.56%, see rank | 32.63% | 33.25% |
ACS 2005-2009 data
Total population: 20,557
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 9,410, 100% | 502,201 | 112,611,029 |
| Average Household Size | 2.14, see rank | 2.54 | 2.60 |
| 1 Person Households | 3,406, 36.20%, see rank | 24.82% | 27.32% |
| 2 or More Person Households | 6,004, 63.80%, see rank | 75.18% | 72.68% |
| Family Households (Families) | 4,676, 49.69%, see rank | 67.68% | 66.67% |
| Average Family Size | 2.90, see rank | 3.12 | 3.27 |
| Married-Couple Family | 3,550, 37.73%, see rank | 54.51% | 49.71% |
| Nonfamily Households | 4,734, 50.31%, see rank | 32.32% | 33.33% |
US Census 2000 data
Total population: 20,784
| Portsmouth, NH | New Hampshire | U.S. | |
| Total Households | 9,875, 100% | 474,606 | 105,480,101 |
| Average Household Size | 2.04, see rank | 2.53 | 2.59 |
| 1 Person Households | 3,846, 38.95%, see rank | 24.44% | 25.82% |
| 2 or More Person Households | 6,029, 61.05%, see rank | 75.56% | 74.18% |
| Family Households (Families) | 4,862, 49.24%, see rank | 68.19% | 68.06% |
| Average Family Size | 2.75, see rank | 3.03 | 3.14 |
| Married-Couple Family | 3,730, 37.77%, see rank | 55.30% | 51.66% |
| Nonfamily Households | 5,013, 50.76%, see rank | 31.81% | 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.