John Gregg (September 28, 1828 – October 7, 1864) was an American politician who served as a deputy from Texas to the Provisional Congress of the Confederate States from 1861 to 1862.

He served as a brigade commander officer of the Confederate States Army and was killed in action during the Siege of Petersburg.

He graduated from LaGrange College (now the University of North Alabama) in 1847, where he was subsequently employed as a professor of mathematics.

He used his paper and political clout to call for a secession convention following the election of Abraham Lincoln as President in 1860.

Gregg was one of six members of the convention who were elected to represent Texas in the Provisional Confederate Congress in Montgomery, Alabama, and later in Richmond, Virginia.

[4] After recovering from his wounds, Gregg was given command of the famous Hood's Texas Brigade in Robert E. Lee's Army of Northern Virginia.

On October 7, 1864, Gregg was struck in the neck for a second time and killed along the New Market Road, near Richmond, Virginia.