Alameda County Historical Household and Family Data
ACS 2010-2014 data
Total population: 1,559,308
| Alameda County | California | U.S. | |
| Total Households | 551,734, 100% | 12,617,280 | 116,211,092 |
| Average Household Size | 2.77, see rank | 2.95 | 2.63 |
| 1 Person Households | 144,114, 26.12%, see rank | 24.10% | 27.57% |
| 2 or More Person Households | 407,620, 73.88%, see rank | 75.90% | 72.43% |
| Family Households (Families) | 362,173, 65.64%, see rank | 68.69% | 66.22% |
| Average Family Size | 3.48, see rank | 3.67 | 3.32 |
| Married-Couple Family | 263,945, 47.84%, see rank | 49.11% | 48.42% |
| Nonfamily Households | 189,561, 34.36%, see rank | 31.31% | 33.78% |
US Census 2010 data
Total population: 1,510,271
| Alameda County | California | U.S. | |
| Total Households | 545,138, 100% | 12,577,498 | 116,716,292 |
| Average Household Size | 2.70, see rank | 2.90 | 2.58 |
| 1 Person Households | 141,926, 26.03%, see rank | 23.29% | 26.74% |
| 2 or More Person Households | 403,212, 73.97%, see rank | 76.71% | 73.26% |
| Family Households (Families) | 352,423, 64.65%, see rank | 68.71% | 66.43% |
| Average Family Size | 3.30, see rank | 3.45 | 3.14 |
| Married-Couple Family | 253,685, 46.54%, see rank | 49.40% | 48.42% |
| Nonfamily Households | 192,715, 35.35%, see rank | 31.29% | 33.57% |
ACS 2008-2012 data
Total population: 1,515,136
| Alameda County | California | U.S. | |
| Total Households | 539,179, 100% | 12,466,331 | 115,226,802 |
| Average Household Size | 2.75, see rank | 2.93 | 2.61 |
| 1 Person Households | 148,032, 27.46%, see rank | 24.31% | 27.45% |
| 2 or More Person Households | 391,147, 72.54%, see rank | 75.69% | 72.55% |
| Family Households (Families) | 348,592, 64.65%, see rank | 68.59% | 66.47% |
| Average Family Size | 3.51, see rank | 3.65 | 3.29 |
| Married-Couple Family | 253,695, 47.05%, see rank | 49.35% | 48.97% |
| Nonfamily Households | 190,587, 35.35%, see rank | 31.41% | 33.53% |
ACS 2006-2010 data
Total population: 1,477,980
| Alameda County | California | U.S. | |
| Total Households | 532,026, 100% | 12,392,852 | 114,235,996 |
| Average Household Size | 2.72, see rank | 2.89 | 2.59 |
| 1 Person Households | 149,872, 28.17%, see rank | 24.39% | 27.24% |
| 2 or More Person Households | 382,154, 71.83%, see rank | 75.61% | 72.76% |
| Family Households (Families) | 340,190, 63.94%, see rank | 68.55% | 66.75% |
| Average Family Size | 3.49, see rank | 3.60 | 3.25 |
| Married-Couple Family | 247,210, 46.47%, see rank | 49.76% | 49.60% |
| Nonfamily Households | 191,836, 36.06%, see rank | 31.45% | 33.25% |
ACS 2005-2009 data
Total population: 1,457,095
| Alameda County | California | U.S. | |
| Total Households | 520,096, 100% | 12,187,191 | 112,611,029 |
| Average Household Size | 2.74, see rank | 2.91 | 2.60 |
| 1 Person Households | 147,345, 28.33%, see rank | 24.57% | 27.32% |
| 2 or More Person Households | 372,751, 71.67%, see rank | 75.43% | 72.68% |
| Family Households (Families) | 331,446, 63.73%, see rank | 68.38% | 66.67% |
| Average Family Size | 3.53, see rank | 3.63 | 3.27 |
| Married-Couple Family | 241,783, 46.49%, see rank | 49.93% | 49.71% |
| Nonfamily Households | 188,650, 36.27%, see rank | 31.62% | 33.33% |
US Census 2000 data
Total population: 1,443,741
| Alameda County | California | U.S. | |
| Total Households | 523,366, 100% | 11,502,870 | 105,480,101 |
| Average Household Size | 2.71, see rank | 2.87 | 2.59 |
| 1 Person Households | 136,066, 26.00%, see rank | 23.54% | 25.82% |
| 2 or More Person Households | 387,300, 74.00%, see rank | 76.46% | 74.18% |
| Family Households (Families) | 339,096, 64.79%, see rank | 68.85% | 68.06% |
| Average Family Size | 3.31, see rank | 3.43 | 3.14 |
| Married-Couple Family | 245,766, 46.96%, see rank | 51.09% | 51.66% |
| Nonfamily Households | 184,270, 35.21%, 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.