Thomas Harrison Ridley (died March 22, 1904) was a merchant and political figure in Colony of Newfoundland.
He represented Trinity Bay in the Newfoundland and Labrador House of Assembly from 1869 to 1871 as a Confederate.
He was born in Harbour Grace, the son of Thomas Ridley.
Ridley entered his father's fishery supply business.
In 1871, Ridley resigned his seat in the assembly and moved to England.