Marin County Historical Amount of Rooms in a House Data
ACS 2010-2014 data
| | Marin County | California | U.S. |
| Total Housing Units | 111,669, 100% | 13,781,929 | 132,741,033 |
| 1 Room | 2,680, 2.40%, see rank | 3.13% | 1.95% |
| 2 Rooms | 4,939, 4.42%, see rank | 3.93% | 2.48% |
| 3 Rooms | 11,486, 10.29%, see rank | 12.05% | 9.13% |
| 4 Rooms | 18,436, 16.51%, see rank | 19.24% | 16.60% |
| 5 Rooms | 18,645, 16.70%, see rank | 20.56% | 20.41% |
| 6 Rooms | 20,119, 18.02%, see rank | 16.99% | 18.06% |
| 7 Rooms | 14,725, 13.19%, see rank | 11.06% | 12.27% |
| 8 Rooms | 9,286, 8.32%, see rank | 6.58% | 8.48% |
| 9 Rooms or More | 11,353, 10.17%, see rank | 6.46% | 10.60% |
| Median Rooms | 5.50, see rank | 5.10 | 5.50 |
ACS 2008-2012 data
| | Marin County | California | U.S. |
| Total Housing Units | 111,063, 100% | 13,667,226 | 131,642,457 |
| 1 Room | 2,623, 2.36%, see rank | 3.17% | 1.95% |
| 2 Rooms | 4,520, 4.07%, see rank | 3.78% | 2.36% |
| 3 Rooms | 10,973, 9.88%, see rank | 11.88% | 8.97% |
| 4 Rooms | 19,715, 17.75%, see rank | 19.04% | 16.57% |
| 5 Rooms | 18,400, 16.57%, see rank | 20.50% | 20.41% |
| 6 Rooms | 20,104, 18.10%, see rank | 17.21% | 18.25% |
| 7 Rooms | 14,899, 13.41%, see rank | 11.27% | 12.38% |
| 8 Rooms | 9,311, 8.38%, see rank | 6.78% | 8.59% |
| 9 Rooms or More | 10,518, 9.47%, see rank | 6.38% | 10.52% |
| Median Rooms | 5.50, see rank | 5.10 | 5.50 |
ACS 2006-2010 data
| | Marin County | California | U.S. |
| Total Housing Units | 110,530, 100% | 13,552,624 | 130,038,080 |
| 1 Room | 2,268, 2.05%, see rank | 2.72% | 1.59% |
| 2 Rooms | 5,178, 4.68%, see rank | 4.35% | 2.62% |
| 3 Rooms | 11,872, 10.74%, see rank | 11.89% | 9.02% |
| 4 Rooms | 19,020, 17.21%, see rank | 19.02% | 16.85% |
| 5 Rooms | 18,192, 16.46%, see rank | 20.76% | 20.93% |
| 6 Rooms | 19,246, 17.41%, see rank | 17.56% | 18.56% |
| 7 Rooms | 15,375, 13.91%, see rank | 11.35% | 12.38% |
| 8 Rooms | 9,633, 8.72%, see rank | 6.63% | 8.39% |
| 9 Rooms or More | 9,746, 8.82%, see rank | 5.73% | 9.65% |
| Median Rooms | 5.40, see rank | 5.10 | 5.50 |
ACS 2005-2009 data
| | Marin County | California | U.S. |
| Total Housing Units | 108,205, 100% | 13,268,682 | 127,699,712 |
| 1 Room | 2,217, 2.05%, see rank | 2.41% | 1.39% |
| 2 Rooms | 5,139, 4.75%, see rank | 4.63% | 2.78% |
| 3 Rooms | 11,794, 10.90%, see rank | 11.98% | 9.07% |
| 4 Rooms | 18,335, 16.94%, see rank | 19.05% | 17.03% |
| 5 Rooms | 18,026, 16.66%, see rank | 20.98% | 21.24% |
| 6 Rooms | 19,263, 17.80%, see rank | 17.73% | 18.70% |
| 7 Rooms | 14,594, 13.49%, see rank | 11.32% | 12.36% |
| 8 Rooms | 9,880, 9.13%, see rank | 6.53% | 8.26% |
| 9 Rooms or More | 8,957, 8.28%, see rank | 5.37% | 9.16% |
| Median Rooms | 5.40, see rank | 5.10 | 5.40 |
US Census 2000 data
| | Marin County | California | U.S. |
| Total Housing Units | 104,990, 100% | 12,214,549 | 115,904,641 |
| 1 Room | 3,369, 3.21%, see rank | 5.01% | 2.20% |
| 2 Rooms | 6,718, 6.40%, see rank | 9.38% | 4.81% |
| 3 Rooms | 11,242, 10.71%, see rank | 13.85% | 9.84% |
| 4 Rooms | 16,348, 15.57%, see rank | 15.75% | 15.97% |
| 5 Rooms | 17,843, 16.99%, see rank | 18.95% | 20.89% |
| 6 Rooms | 18,280, 17.41%, see rank | 16.50% | 18.45% |
| 7 Rooms | 13,677, 13.03%, see rank | 10.33% | 12.06% |
| 8 Rooms | 9,566, 9.11%, see rank | 5.93% | 8.06% |
| 9 Rooms or More | 7,947, 7.57%, see rank | 4.31% | 7.70% |
| Median Rooms | 5.30, 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.
