Thomas Worrall Casey (13 October 1869 – 29 November 1949) was a British Liberal politician and Trade Union leader.

He was born in the Intake district of Sheffield, as the son of William and Jemima Ann Casey.

In 1916 his eldest son, Alpheaus Abbott Casey of the York and Lancaster Regiment, was killed in the First World War.

He left and started at Cadeby Colliery, near Rotherham, as a winding engineman, and remained there for 24 years.

He benefitted from being endorsed by Prime Minister David Lloyd George.