And this other related spreadsheet has the 2010 census data on household size. Provo metro is off the charts as an outlier here at 3.57 people per household when the state of Utah (highest nationally) is at 3.10 with CA coming in 2nd at 2.90. The national average people per household is only 2.58, essentially 1 fewer per household than Provo metro/Utah Co. Provo metro only has 11.7% of "householders living alone" (lowest figure I found) while national average is 26.7%.