Ontario, CA Historical Amount of Rooms in a House Data
ACS 2010-2014 data
| | Ontario, CA | California | U.S. |
| Total Housing Units | 49,093, 100% | 13,781,929 | 132,741,033 |
| 1 Room | 655, 1.33%, see rank | 3.13% | 1.95% |
| 2 Rooms | 1,268, 2.58%, see rank | 3.93% | 2.48% |
| 3 Rooms | 4,301, 8.76%, see rank | 12.05% | 9.13% |
| 4 Rooms | 9,732, 19.82%, see rank | 19.24% | 16.60% |
| 5 Rooms | 12,001, 24.45%, see rank | 20.56% | 20.41% |
| 6 Rooms | 10,407, 21.20%, see rank | 16.99% | 18.06% |
| 7 Rooms | 6,260, 12.75%, see rank | 11.06% | 12.27% |
| 8 Rooms | 2,383, 4.85%, see rank | 6.58% | 8.48% |
| 9 Rooms or More | 2,086, 4.25%, see rank | 6.46% | 10.60% |
| Median Rooms | 5.20, see rank | 5.10 | 5.50 |
ACS 2008-2012 data
| | Ontario, CA | California | U.S. |
| Total Housing Units | 47,948, 100% | 13,667,226 | 131,642,457 |
| 1 Room | 753, 1.57%, see rank | 3.17% | 1.95% |
| 2 Rooms | 1,473, 3.07%, see rank | 3.78% | 2.36% |
| 3 Rooms | 4,619, 9.63%, see rank | 11.88% | 8.97% |
| 4 Rooms | 9,761, 20.36%, see rank | 19.04% | 16.57% |
| 5 Rooms | 11,223, 23.41%, see rank | 20.50% | 20.41% |
| 6 Rooms | 9,611, 20.04%, see rank | 17.21% | 18.25% |
| 7 Rooms | 6,242, 13.02%, see rank | 11.27% | 12.38% |
| 8 Rooms | 2,290, 4.78%, see rank | 6.78% | 8.59% |
| 9 Rooms or More | 1,976, 4.12%, see rank | 6.38% | 10.52% |
| Median Rooms | 5.20, see rank | 5.10 | 5.50 |
ACS 2006-2010 data
| | Ontario, CA | California | U.S. |
| Total Housing Units | 48,575, 100% | 13,552,624 | 130,038,080 |
| 1 Room | 543, 1.12%, see rank | 2.72% | 1.59% |
| 2 Rooms | 1,217, 2.51%, see rank | 4.35% | 2.62% |
| 3 Rooms | 4,972, 10.24%, see rank | 11.89% | 9.02% |
| 4 Rooms | 10,235, 21.07%, see rank | 19.02% | 16.85% |
| 5 Rooms | 10,269, 21.14%, see rank | 20.76% | 20.93% |
| 6 Rooms | 10,017, 20.62%, see rank | 17.56% | 18.56% |
| 7 Rooms | 6,630, 13.65%, see rank | 11.35% | 12.38% |
| 8 Rooms | 2,824, 5.81%, see rank | 6.63% | 8.39% |
| 9 Rooms or More | 1,868, 3.85%, see rank | 5.73% | 9.65% |
| Median Rooms | 5.20, see rank | 5.10 | 5.50 |
ACS 2005-2009 data
| | Ontario, CA | California | U.S. |
| Total Housing Units | 50,084, 100% | 13,268,682 | 127,699,712 |
| 1 Room | 600, 1.20%, see rank | 2.41% | 1.39% |
| 2 Rooms | 1,352, 2.70%, see rank | 4.63% | 2.78% |
| 3 Rooms | 5,495, 10.97%, see rank | 11.98% | 9.07% |
| 4 Rooms | 10,218, 20.40%, see rank | 19.05% | 17.03% |
| 5 Rooms | 10,968, 21.90%, see rank | 20.98% | 21.24% |
| 6 Rooms | 10,093, 20.15%, see rank | 17.73% | 18.70% |
| 7 Rooms | 6,848, 13.67%, see rank | 11.32% | 12.36% |
| 8 Rooms | 2,765, 5.52%, see rank | 6.53% | 8.26% |
| 9 Rooms or More | 1,745, 3.48%, see rank | 5.37% | 9.16% |
| Median Rooms | 5.20, see rank | 5.10 | 5.40 |
US Census 2000 data
| | Ontario, CA | California | U.S. |
| Total Housing Units | 45,124, 100% | 12,214,549 | 115,904,641 |
| 1 Room | 1,706, 3.78%, see rank | 5.01% | 2.20% |
| 2 Rooms | 4,707, 10.43%, see rank | 9.38% | 4.81% |
| 3 Rooms | 6,897, 15.28%, see rank | 13.85% | 9.84% |
| 4 Rooms | 7,300, 16.18%, see rank | 15.75% | 15.97% |
| 5 Rooms | 8,218, 18.21%, see rank | 18.95% | 20.89% |
| 6 Rooms | 7,989, 17.70%, see rank | 16.50% | 18.45% |
| 7 Rooms | 4,967, 11.01%, see rank | 10.33% | 12.06% |
| 8 Rooms | 2,031, 4.50%, see rank | 5.93% | 8.06% |
| 9 Rooms or More | 1,309, 2.90%, see rank | 4.31% | 7.70% |
| Median Rooms | 4.70, see rank | 4.80 | 5.30 |
* 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.
