Click the links below for easy to use resources comparing Marin County School Scores:
http://www.greatschools.net/search/search.page?state=CA&q=Marin+&type=school
http://school-ratings.com/counties/Marin.html

As we all know, owning a small slice of the American dream in Marin requires an amount of money many people consider either shocking (if they’re trying to buy here) or laughable (if they’re loving their three-figure mortgage payment elsewhere in flyover country).
Chalk up much of that monster monthly bite to the cost of California living. The Golden State demands a premium for its attractions and we pay it. The price of admission for many cities in Marin, though, is even higher. Beyond the obvious reasons for this extra tariff—easy commute, great scenery and the general joie-de-vivre zeitgeist that permeates the Marin mindset—one factor stands out: The public schools in places like Mill Valley, Tiburon, Kentfield and Ross are great, as good as much ritzier private schools.
More simply, these local schools have the magnetism to entice an increasing number of families into buying some of Marin’s priciest real estate so they can gain access to an excellent—and free—public school education.