A frontispiece of Pinckney published after his death.

John McPherson Pinckney (May 4, 1845 - April 24, 1905) was a United States Representative from Texas.

Born in Grimes County, Texas, near the town of Hempstead, Waller County, Pinckney attended public schools and was privately instructed. He enlisted as a private in theConfederate States Army and served in Company D, Fourth Texas Brigade, until the close of the Civil War, attaining the rank of first lieutenant.

He studied law, was admitted to the bar in 1875, and commenced practice in Hempstead, Texas. He served as district attorney for the twenty-third judicial district of Texas 1890-1900. He was the county judge of Waller County 1900-1903.

Pinckney was elected as a Democrat to the Fifty-eighth Congress to fill the vacancy caused by the resignation of Thomas H. Ball. He was reelected to the Fifty-ninth Congress and served from November 17, 1903, until April 24, 1905, when he was assaulted and killed at Hempstead, Texas during a political event which turned violent when one of the participants, Capt. Hal Mosely Browne, began shooting. Other attendees began to shoot as well and a riot broke out. Pickney, his brother Tom, and Browne were all killed at the scene. He was interred in the City Cemetery at Hempstead.