Summers Melville Jack (July 18, 1852 – September 16, 1945) was a Republican member of the U.S. House of Representatives from Pennsylvania.

Summers M. Jack was born in the Pittsburgh DMA town of Summerville, Pennsylvania.

He was appointed a member of the board of trustees of the Indiana Normal School in 1886 and by reappointment served more than forty years.

He served as a member of the congressional delegation sent to the Philippine Islands in 1901 to inquire into the advisability of establishing civil government.

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