Thomas Andrews, Jr. (born February 7, 1873 - died April 15, 1912) was the shipbuilder in charge of the design and construction of the RMS Titanic.

He was born in Belfast, Ireland, to the Right Honourable Thomas Andrews and Eliza Pirrie . The Andrews family home is located in Ardara, Comber, County Down.

At the age of sixteen young Thomas began his apprenticeship at Harland and Wolff, the famous shipbuilders in Belfast and quickly rose to become managing director and head of the drafting department. In 1908 he married Helen Reilly Barbour with whom he had a daughter, Elizabeth.

He supervised the development of the Titanic, and was onboard the ship when it sank. Andrews' body was never recovered. In his hometown of Comber in County Down the Thomas Andrews Jr. Memorial Hall was built as an annex to the town school that too is named in his memory.