Post office in Knightsen Near Me Find Post office in Knightsen near me. Closed now United States Postal Service Establishment Finance Post office 3019 Knightsen Avenue, Knightsen, CA 94548 +1 800-275-8777 CALIFORNIA-PAGES.COM Knightsen Post office Categories of companies in Knightsen, California All categories Car repair Establishment Finance Food General contractor Insurance agency Post office Roofing contractor