US Post Office is located at 45 Bay St # 2, Staten Island, NY. 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, 8:05am-1pm; Sun, Closed and accepts American Express, Discover, Mastercard and Visa.