Post offices in the county of Napa, CA

Use this page to find the post offices in your county that open earliest or stay open latest. The open hours listed are for the post office's retail hours, which means the hours in which a postal service employee is available at the counter to help with mailings and other services. Oftentimes lobbies are open extended hours, and you are able to check your PO box, drop off packages, or use the self-service APC machine to buy postage. The list below is first sorted alphabetically by city, then by post office name. Street View photos of post offices are shown when available. Please contact us if you find an error, so that we can correct it.

Street View Image of American Canyon Post Office in American Canyon, CA

American Canyon Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
310 Crawford Way American Canyon , CA 94503-9991

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Open hours
Day Open Close
Monday 10:00 AM 1:00 PM
2:00 PM 4:00 PM
Tuesday 10:00 AM 1:00 PM
2:00 PM 4:00 PM
Wednesday 10:00 AM 1:00 PM
2:00 PM 4:00 PM
Thursday 10:00 AM 1:00 PM
2:00 PM 4:00 PM
Friday 10:00 AM 1:00 PM
2:00 PM 4:00 PM
Saturday 10:00 AM 1:00 PM
Sunday Closed
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Street View Image of Angwin Post Office in Angwin, CA

Angwin Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
5 Angwin Plz Angwin , CA 94508-9997

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Open hours
Day Open Close
Monday 8:30 AM 4:00 PM
Tuesday 8:30 AM 4:00 PM
Wednesday 8:30 AM 4:00 PM
Thursday 8:30 AM 4:00 PM
Friday 8:30 AM 4:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
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Street View Image of Calistoga Post Office in Calistoga, CA

Calistoga Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1013 Washington St Calistoga , CA 94515-9998

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Open hours
Day Open Close
Monday 9:00 AM 4:30 PM
Tuesday 9:00 AM 4:30 PM
Wednesday 9:00 AM 4:30 PM
Thursday 9:00 AM 4:30 PM
Friday 9:00 AM 4:30 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
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Street View Image of Franklin Post Office in Napa, CA

Franklin Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1436 2nd St Napa, CA 94559-2953

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Open hours
Day Open Close
Monday 9:00 AM 5:00 PM
Tuesday 9:00 AM 5:00 PM
Wednesday 9:00 AM 5:00 PM
Thursday 9:00 AM 5:00 PM
Friday 9:00 AM 5:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
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Street View Image of Napa Post Office in Napa, CA

Napa Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1625 Trancas St Napa, CA 94558-9998

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Open hours
Day Open Close
Monday 8:30 AM 5:00 PM
Tuesday 8:30 AM 5:00 PM
Wednesday 8:30 AM 5:00 PM
Thursday 8:30 AM 5:00 PM
Friday 8:30 AM 5:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
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Street View Image of Oakville Post Office in Oakville, CA

Oakville Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
7856 St Helena Hwy Oakville , CA 94562-9200

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Open hours
Day Open Close
Monday 8:00 AM 12:00 PM
1:00 PM 4:00 PM
Tuesday 8:00 AM 12:00 PM
1:00 PM 4:00 PM
Wednesday 8:00 AM 12:00 PM
1:00 PM 4:00 PM
Thursday 8:00 AM 12:00 PM
1:00 PM 4:00 PM
Friday 8:00 AM 12:00 PM
1:00 PM 4:00 PM
Saturday 8:00 AM 11:30 AM
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
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    $100 value
Street View Image of Pope Valley Post Office in Pope Valley, CA

Pope Valley Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
5850 Pope Valley Rd Pope Valley , CA 94567-9800

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Open hours
Day Open Close
Monday 8:30 AM 1:00 PM
1:30 PM 3:00 PM
Tuesday 8:30 AM 1:00 PM
1:30 PM 3:00 PM
Wednesday 8:30 AM 1:00 PM
1:30 PM 3:00 PM
Thursday 8:30 AM 1:00 PM
1:30 PM 3:00 PM
Friday 8:30 AM 1:00 PM
1:30 PM 3:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
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Street View Image of Rutherford Post Office in Rutherford, CA

Rutherford Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1190 Rutherford Rd Rutherford , CA 94573-9800

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Open hours
Day Open Close
Monday 8:30 AM 1:00 PM
1:30 PM 4:00 PM
Tuesday 8:30 AM 1:00 PM
1:30 PM 4:00 PM
Wednesday 8:30 AM 1:00 PM
1:30 PM 4:00 PM
Thursday 8:30 AM 1:00 PM
1:30 PM 4:00 PM
Friday 8:30 AM 1:00 PM
1:30 PM 4:00 PM
Saturday 9:00 AM 1:00 PM
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
    STAMPS100
    $100 value
Street View Image of Saint Helena Post Office in Saint Helena, CA

Saint Helena Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
1461 Main St Saint Helena , CA 94574-9998

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Open hours
Day Open Close
Monday 9:00 AM 5:00 PM
Tuesday 9:00 AM 5:00 PM
Wednesday 9:00 AM 5:00 PM
Thursday 9:00 AM 5:00 PM
Friday 9:00 AM 5:00 PM
Saturday 10:00 AM 1:00 PM
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
    STAMPS100
    $100 value
Street View Image of Veterans Home Post Office in Yountville, CA

Veterans Home Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
260 California Dr Yountville, CA 94599-1412

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Open hours
Day Open Close
Monday 9:00 AM 1:00 PM
Tuesday 9:00 AM 1:00 PM
Wednesday 9:00 AM 1:00 PM
Thursday 9:00 AM 1:00 PM
Friday 9:00 AM 1:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
    STAMPS100
    $100 value
Street View Image of Yountville Post Office in Yountville, CA

Yountville Post Office is currently closed

For parking and list of services available, visit the official USPS page for post this post office location.

Post office address
6514 Washington St Yountville, CA 94599-5000

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Open hours
Day Open Close
Monday 9:00 AM 4:00 PM
Tuesday 9:00 AM 4:00 PM
Wednesday 9:00 AM 4:00 PM
Thursday 9:00 AM 4:00 PM
Friday 9:00 AM 4:00 PM
Saturday Closed
Sunday Closed
  • Stamps.com logo
    Buy postage online
    Discounted USPS and UPS rates of up to 84%.
    Promo code
    STAMPS100
    $100 value