Sample of Marin Communities
The following are some of the communities located in Marin County:
| Community | 2009
Population | 2000
Population | Change
(2009 vs. 2000) |
| San Rafael | 55,902 | 56,063 | 0.29% decrease |
| Novato | 53,450 | 47,630 | 12.22% increase |
| Mill Valley | 13,404 | 13,600 | 1.44% decrease |
| San Anselmo | 12,058 | 12,378 | 2.59% decrease |
| Larkspur | 11,799 | 12,014 | 1.79% decrease |
| Corte Madera | 9,289 | 9,100 | 2.08% increase |
| Tiburon | 8,731 | 8,666 | 0.75% increase |
| Sausalito | 7,199 | 7,330 | 1.79% decrease |
| Fairfax | 7,099 | 7,319 | 3.01% decrease |
| Ross | 2,287 | 2,329 | 1.8% decrease |
| Belvedere | 2,057 | 2,125 | 3.2% decrease |
Counties Neighboring Marin
The following counties adjoin and form the boundaries of Marin:
| County | Direction | 2009
Population | 2000
Population | Change
(2009 vs. 2000) |
| Contra Costa |  E | 1,041,274 | 948,816 | 9.74% |
| San Francisco |  SE | 815,358 | 776,733 | 4.97% |
| Sonoma |  N | 472,102 | 458,614 | 2.94% |
The western boundary of the county is on the Pacific Ocean and San Francisco Bay is to the southeast.
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