San Marcos, CA Post Offices
USPS - United States Post Office
277 S Rancho Santa Fe Rd. G,
San Marcos, 92078
760-744-4954
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United States Postal Service
Special Offer: USPS is hiring! See openings for top jobs.
420 N Twin Oaks Valley Rd,
San Marcos, 92069
800-275-8777
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USPS - United States Post Office
1318 E Mission Rd.,
San Marcos, 92069
760-737-0800
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Postal Annex 3002
751 Center Dr.,
San Marcos, 92069
760-741-1112
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