John Klingensmith Jr. (March 26, 1786 – February 8, 1854) was an American politician from Pennsylvania who served as a Jacksonian member of the U.S. House of Representatives for Pennsylvania's 19th congressional district from 1835 to 1839.
John Klingensmith Jr. was born in Westmoreland County, Pennsylvania to John J. Sr. and Anna Elizabeth (Kauffer) Klingensmith.
He was a member of the Pennsylvania State Senate for the 18th district from 1831 to 1835 and served as secretary of the land office of Pennsylvania from 1839 to 1842.
Klingensmith was co-owner of The Greensburg Democrat newspaper from 1853 to 1854.
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