John Whitaker Lord Jr. (December 19, 1901 – May 16, 1972) was an American politician and judge from Pennsylvania. He served as a Republican member of the Pennsylvania Senate for the 6th district from 1947 to 1951 and the Philadelphia City Council from 1952 to 1954. He served as a United States district judge of the United States District Court for the Eastern District of Pennsylvania from 1954 until his death in 1972.