Post office in Sierra City Near Me Find Post office in Sierra City near me. Closed now United States Postal Service Establishment Finance Post office 215 Main Street, Sierra City, CA 96125 +1 800-275-8777 CALIFORNIA-PAGES.COM Sierra City Post office Categories of companies in Sierra City, California All categories Atm Bar Cafe Campground Church Clothing store Establishment Finance Fire station Food Gas station Insurance agency Jewelry store Local government office Lodging Museum Park Place of worship Post office Real estate agency Restaurant Rv park Spa Supermarket