Find Post office in Clayville Near Me You can choose from the presented list of Post office in Clayville, New York. Find Post office near me. United States Postal Service Establishment Post office 2370 Main Street, Clayville, NY 13322 +1 800-275-8777 NEW-YORK-BD.COM Clayville Post office Categories of companies in Clayville, New York All categories Cafe Cemetery Church Establishment Fire station Food General contractor Insurance agency Library Local government office Lodging Place of worship Police Post office