US Post Office is located at 1445 34Th Ave, Oakland, CA. This location is in the Saint Elizabeth neighborhood. This business specializes in Post Offices. US Post Office is open Mon, 8:05am-5pm; Tue, 8:05am-5pm; Wed, 8:05am-5pm; Thu, 8:05am-5pm; Fri, 8:05am-5pm; Sat, 8am-2pm; Sun, Closed and accepts American Express, Discover, Mastercard and Visa.