There are 6 United States Postal Service post boxes available to the public in Newcastle, CA. You can use any one of these locations to mail your letter or small package. For additional collection boxes in neighboring communities, see the list of post boxes in California.

Are you looking for a post office? See the list of post offices in Newcastle, CA.

Public Collection Box
9241 Old State Hwy
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Public Collection Box
671 Newcastle Rd
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Wells Fargo Bank
458 Main St
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Public Collection Box
2205 Rippey Rd
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Public Collection Box
650 Auburn Folsom Rd
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Public Collection Box
1583 Lincoln Way
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