Hamilton Ward Jr. (January 20, 1871 — October 8, 1932) was an American lawyer and politician.

The younger Ward was educated at Saint Paul's Hall in Salem, New York and the Vermont Episcopal Institute in Burlington.

He later relocated to Buffalo, New York, where he was Erie County's collateral inheritance clerk and an assistant district attorney.

Ward was a prominent Buffalonian and an ardent conservationist who was instrumental in the establishment and design of Chesnut Ridge Park in the 1920s.

Upon his death, he bequeathed several hundred acres of his property to the county that became part of Chesnut Ridge Park.