Martinez, CA Post Offices
Martinez, California has a population of 38,027. According to the 2021 census, the city's 3 post offices serve 14,668 households with a median income of 14,668. The city is located in Contra Costa County and has a land area of 32,753,076 and a water area of 2,599,576.
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Post Office
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Address
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Phone
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Hours
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| Martinez, CA Post Office | 815 Court St, Martinez, California, CA, 94553-9991 |
925-229-4795
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Today 08:30:00 - 17:00:00
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