U.S. Postal Office Williamson – 14589 Pultneyville -14538 East Williamson – 14449 Sodus – 14551 Ontario – 14519 Marion – 14505 Union Hill – 14563 Walworth – 14568 Ontario Center – 14520 Popular Resources About Williamson Forms & Files Pay Your Bill Town Codes Public Safety Parks Community Resources News & Archives Wayne County