Donald Grey Barnhouse was a Presbyterian pastor and Bible teacher whose program The Bible Study Hour became a staple of mid twentieth century Christian radio. Known for his clear doctrinal teaching and strong personality, he pastored Tenth Presbyterian Church in Philadelphia while building a national radio audience.

Barnhouse major radio work The Bible Study Hour offered systematic Bible teaching and doctrinal exposition, shaping expectations for serious teaching on Christian radio. His broadcasts influenced later teaching ministries and helped normalize expository content on the airwaves.

Presbyterian pastor and teacher known for The Bible Study Hour radio program.