US Post Office is located at 5670 E Washington Blvd, Commerce, CA. This location is in the Montebello neighborhood. This business specializes in Post Offices and has 1 review(s) with a star rating of 1.0. US Post Office is open Mon, 8:05am-5:05pm; Tue, 8:05am-5:05pm; Wed, 8:05am-5:05pm; Thu, 8:05am-5:05pm; Fri, 8:05am-5:05pm; Sat, 8:05am-1pm; Sun, Closed and accepts American Express, Discover,...