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Saint Clair County Historical Household and Family Data
ACS 2010-2014 data
Total population: 268,415
| Saint Clair County | Illinois | U.S. | |
| Total Households | 102,404, 100% | 4,778,633 | 116,211,092 |
| Average Household Size | 2.58, see rank | 2.63 | 2.63 |
| 1 Person Households | 30,058, 29.35%, see rank | 28.68% | 27.57% |
| 2 or More Person Households | 72,346, 70.65%, see rank | 71.32% | 72.43% |
| Family Households (Families) | 68,053, 66.46%, see rank | 65.52% | 66.22% |
| Average Family Size | 3.29, see rank | 3.36 | 3.32 |
| Married-Couple Family | 45,894, 44.82%, see rank | 48.22% | 48.42% |
| Nonfamily Households | 34,351, 33.54%, see rank | 34.48% | 33.78% |
US Census 2010 data
Total population: 270,056
| Saint Clair County | Illinois | U.S. | |
| Total Households | 105,045, 100% | 4,836,972 | 116,716,292 |
| Average Household Size | 2.53, see rank | 2.59 | 2.58 |
| 1 Person Households | 28,916, 27.53%, see rank | 27.83% | 26.74% |
| 2 or More Person Households | 76,129, 72.47%, see rank | 72.17% | 73.26% |
| Family Households (Families) | 70,689, 67.29%, see rank | 65.81% | 66.43% |
| Average Family Size | 3.09, see rank | 3.20 | 3.14 |
| Married-Couple Family | 46,846, 44.60%, see rank | 48.23% | 48.42% |
| Nonfamily Households | 34,356, 32.71%, see rank | 34.19% | 33.57% |
ACS 2008-2012 data
Total population: 268,873
| Saint Clair County | Illinois | U.S. | |
| Total Households | 102,936, 100% | 4,774,275 | 115,226,802 |
| Average Household Size | 2.57, see rank | 2.62 | 2.61 |
| 1 Person Households | 29,927, 29.07%, see rank | 28.52% | 27.45% |
| 2 or More Person Households | 73,009, 70.93%, see rank | 71.48% | 72.55% |
| Family Households (Families) | 68,854, 66.89%, see rank | 65.82% | 66.47% |
| Average Family Size | 3.26, see rank | 3.34 | 3.29 |
| Married-Couple Family | 46,177, 44.86%, see rank | 48.67% | 48.97% |
| Nonfamily Households | 34,082, 33.11%, see rank | 34.18% | 33.53% |
ACS 2006-2010 data
Total population: 266,727
| Saint Clair County | Illinois | U.S. | |
| Total Households | 103,084, 100% | 4,769,951 | 114,235,996 |
| Average Household Size | 2.55, see rank | 2.61 | 2.59 |
| 1 Person Households | 29,524, 28.64%, see rank | 28.23% | 27.24% |
| 2 or More Person Households | 73,560, 71.36%, see rank | 71.77% | 72.76% |
| Family Households (Families) | 69,078, 67.01%, see rank | 66.28% | 66.75% |
| Average Family Size | 3.22, see rank | 3.31 | 3.25 |
| Married-Couple Family | 46,384, 45.00%, see rank | 49.36% | 49.60% |
| Nonfamily Households | 34,006, 32.99%, see rank | 33.72% | 33.25% |
ACS 2005-2009 data
Total population: 261,268
| Saint Clair County | Illinois | U.S. | |
| Total Households | 102,488, 100% | 4,749,388 | 112,611,029 |
| Average Household Size | 2.51, see rank | 2.62 | 2.60 |
| 1 Person Households | 28,943, 28.24%, see rank | 28.40% | 27.32% |
| 2 or More Person Households | 73,545, 71.76%, see rank | 71.60% | 72.68% |
| Family Households (Families) | 69,313, 67.63%, see rank | 66.09% | 66.67% |
| Average Family Size | 3.15, see rank | 3.34 | 3.27 |
| Married-Couple Family | 46,359, 45.23%, see rank | 49.35% | 49.71% |
| Nonfamily Households | 33,175, 32.37%, see rank | 33.91% | 33.33% |
US Census 2000 data
Total population: 256,082
| Saint Clair County | Illinois | U.S. | |
| Total Households | 96,810, 100% | 4,591,779 | 105,480,101 |
| Average Household Size | 2.59, see rank | 2.63 | 2.59 |
| 1 Person Households | 25,115, 25.94%, see rank | 26.78% | 25.82% |
| 2 or More Person Households | 71,695, 74.06%, see rank | 73.22% | 74.18% |
| Family Households (Families) | 67,323, 69.54%, see rank | 67.63% | 68.06% |
| Average Family Size | 3.13, see rank | 3.23 | 3.14 |
| Married-Couple Family | 46,557, 48.09%, see rank | 51.26% | 51.66% |
| Nonfamily Households | 29,487, 30.46%, see rank | 32.37% | 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.