Post office in North San Juan Near Me Find Post office in North San Juan near me. Open now United States Postal Service Establishment Finance Post office 20092 Oak Tree Road, North San Juan, CA 95960 +1 800-275-8777 CALIFORNIA-PAGES.COM North San Juan Post office Categories of companies in North San Juan, California All categories Accounting Bar Car dealer Establishment Finance Fire station Food General contractor Health Lodging Post office Rv park School