http://www.latimes.com/news/local/politics/cal/la-2008election-prop8prop22,0,6153805.htmlstory

There are some interesting regional variations. Proposition 22 passed in 2000 by 61%-39%, and Proposition 8 this year by 52%-48%, so we almost made it. The San Francisco Bay Area is the biggest supporter of gay marriage, likely because of San Francisco’s prominent gay community. But back in 2000, only some Bay Area counties supported gay marriage, but nowadays, nearly all of them do. And of the opponents of gay marriage, big-city areas like Sacramento and Los Angeles and Orange County and San Diego opposed it less, and were joined by much of the California coast and college-town areas (Santa Cruz, home of UCSC, and Yolo, home of UC Davis). However, much of the Central Valley and northernmost California continued to oppose it by similar fractions.

Yes, Orange County opposed gay marriage less, so there might be some hope for that area despite it being the only California big-city area to prefer John McCain in the recent election. Another LA Times map:
http://projects.latimes.com/graphics/2008-presidential-election-results-by-county/

The main blue areas are urban areas and minority-heavy rural areas, with rural whites usually being red. But there are some rural whites who are consistently blue, notably in New England and the northern Midwest.

Also, rejection of gay marriage was not necessarily associated with rejection of abortion; Proposition 4, which called for parental notification for teenage girls’ abortions, failed by 52% – 48%. The LA Times again:
http://www.latimes.com/news/local/la-2008election-prop8prop4,0,7638046.htmlstory

A lot of rejecters of gay marriage evidently thought that abortion ought to be available without such a troublesome condition, though they were mostly urban ones. Colorado rejected a fetal-personhood amendment by about 3 to 1, though by larger margins in urban areas than in rural areas. So there are some interesting differences in values between urban and rural areas here in the U.S. of A.