Mayhew Beckwith (October 14, 1798 – April 7, 1871) was a merchant and political figure in Nova Scotia.
He represented Cornwallis in the Nova Scotia House of Assembly from 1841 to 1851.
He was born in Cornwallis_Township, the son of Handley Beckwith and Catherine Newcomb.
He married Eunice Rand in 1829.
Beckwith served on the board of governors for Acadia College