2026 Compare Cities Health:
San Marcos, CA vs Castro Valley, CA

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Highlights
- There are 226 physicians per 100,000 people in Castro Valley.
- There are 233 physicians per 100,000 people in San Marcos.
- The US average is 210 physicians per 100,000 people.
 San Marcos, CACastro Valley, CAUnited States
 Air Quality (100=best)  Unlock63.158.4
 Water Quality (100=best)75  Unlock55
 Superfund Sites (100=best)  Unlock94.386.9
 Physicians per Cap.233  Unlock210
 Health Cost  Unlock104100
   (100 = best)
Reviews for San Marcos    5 Reviews

Just an amazing place to live. I have lived in 7 states and almost countless cities. Sam Marcos is one of the best. This is literally the longest place I have lived  More

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Over 16 years ago

Is this area to expensive for the average income retired  More

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Over 19 years ago

Beautiful Mediterranean climate with bright sunshine and ocean breazes. City is just 15 minutes away from the  More

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Reviews for Castro Valley    7 Reviews

CURMUDGEON - THANK YOU for your post. The most important part of your comment is your second paragraph. "Hodge-Podge" is the correct word for a lot of Castro  More

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Over 12 years ago

Kind of rural but close to Oakland and San  More

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Castro Valley is the largest unincorporated "city" in the Bay Area. Over the years, several attempts have been made to incorporate, but they have all been defeated at  More

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