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Foster City, CA Historical Household and Family Data
ACS 2010-2014 data
Total population: 31,809
| Foster City, CA | California | U.S. | |
| Total Households | 12,188, 100% | 12,617,280 | 116,211,092 |
| Average Household Size | 2.60, see rank | 2.95 | 2.63 |
| 1 Person Households | 2,916, 23.93%, see rank | 24.10% | 27.57% |
| 2 or More Person Households | 9,272, 76.07%, see rank | 75.90% | 72.43% |
| Family Households (Families) | 8,647, 70.95%, see rank | 68.69% | 66.22% |
| Average Family Size | 3.17, see rank | 3.67 | 3.32 |
| Married-Couple Family | 7,297, 59.87%, see rank | 49.11% | 48.42% |
| Nonfamily Households | 3,541, 29.05%, see rank | 31.31% | 33.78% |
US Census 2010 data
Total population: 30,567
| Foster City, CA | California | U.S. | |
| Total Households | 12,016, 100% | 12,577,498 | 116,716,292 |
| Average Household Size | 2.53, see rank | 2.90 | 2.58 |
| 1 Person Households | 2,807, 23.36%, see rank | 23.29% | 26.74% |
| 2 or More Person Households | 9,209, 76.64%, see rank | 76.71% | 73.26% |
| Family Households (Families) | 8,406, 69.96%, see rank | 68.71% | 66.43% |
| Average Family Size | 3.04, see rank | 3.45 | 3.14 |
| Married-Couple Family | 7,127, 59.31%, see rank | 49.40% | 48.42% |
| Nonfamily Households | 3,610, 30.04%, see rank | 31.29% | 33.57% |
ACS 2008-2012 data
Total population: 30,754
| Foster City, CA | California | U.S. | |
| Total Households | 11,849, 100% | 12,466,331 | 115,226,802 |
| Average Household Size | 2.58, see rank | 2.93 | 2.61 |
| 1 Person Households | 2,663, 22.47%, see rank | 24.31% | 27.45% |
| 2 or More Person Households | 9,186, 77.53%, see rank | 75.69% | 72.55% |
| Family Households (Families) | 8,375, 70.68%, see rank | 68.59% | 66.47% |
| Average Family Size | 3.13, see rank | 3.65 | 3.29 |
| Married-Couple Family | 7,140, 60.26%, see rank | 49.35% | 48.97% |
| Nonfamily Households | 3,474, 29.32%, see rank | 31.41% | 33.53% |
ACS 2006-2010 data
Total population: 29,746
| Foster City, CA | California | U.S. | |
| Total Households | 11,729, 100% | 12,392,852 | 114,235,996 |
| Average Household Size | 2.54, see rank | 2.89 | 2.59 |
| 1 Person Households | 2,701, 23.03%, see rank | 24.39% | 27.24% |
| 2 or More Person Households | 9,028, 76.97%, see rank | 75.61% | 72.76% |
| Family Households (Families) | 8,211, 70.01%, see rank | 68.55% | 66.75% |
| Average Family Size | 3.07, see rank | 3.60 | 3.25 |
| Married-Couple Family | 7,035, 59.98%, see rank | 49.76% | 49.60% |
| Nonfamily Households | 3,518, 29.99%, see rank | 31.45% | 33.25% |
ACS 2005-2009 data
Total population: 28,696
| Foster City, CA | California | U.S. | |
| Total Households | 11,296, 100% | 12,187,191 | 112,611,029 |
| Average Household Size | 2.54, see rank | 2.91 | 2.60 |
| 1 Person Households | 2,678, 23.71%, see rank | 24.57% | 27.32% |
| 2 or More Person Households | 8,618, 76.29%, see rank | 75.43% | 72.68% |
| Family Households (Families) | 7,843, 69.43%, see rank | 68.38% | 66.67% |
| Average Family Size | 3.09, see rank | 3.63 | 3.27 |
| Married-Couple Family | 6,850, 60.64%, see rank | 49.93% | 49.71% |
| Nonfamily Households | 3,453, 30.57%, see rank | 31.62% | 33.33% |
US Census 2000 data
Total population: 28,803
| Foster City, CA | California | U.S. | |
| Total Households | 11,613, 100% | 11,502,870 | 105,480,101 |
| Average Household Size | 2.47, see rank | 2.87 | 2.59 |
| 1 Person Households | 2,739, 23.59%, see rank | 23.54% | 25.82% |
| 2 or More Person Households | 8,874, 76.41%, see rank | 76.46% | 74.18% |
| Family Households (Families) | 7,928, 68.27%, see rank | 68.85% | 68.06% |
| Average Family Size | 2.97, see rank | 3.43 | 3.14 |
| Married-Couple Family | 6,699, 57.69%, see rank | 51.09% | 51.66% |
| Nonfamily Households | 3,685, 31.73%, see rank | 31.15% | 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.