Alexander White Gregg (January 31, 1855 – April 30, 1919) was a Democratic member of the United States House of Representatives between 1903 and 1919.

Alexander W. Gregg
Harris & Ewing photo, circa 1918
Member of the U.S. House of Representatives from Texas's 7th district
In office March 4, 1903 – March 3, 1919
Preceded by	Robert Lee Henry
Succeeded by	Clay Stone Briggs
Personal details
Born	(1855-01-31)January 31, 1855 Centerville, Texas
Died	April 30, 1919(1919-04-30) (aged 64) Palestine, Texas
Political party	Democratic

Gregg was born in Centerville, Texas on January 31, 1855. As a child, he went to a public school. He attended King College in Bristol, Tennessee, graduating in 1874 and later studied law at the University of Virginia at Charlottesville. He was admitted to the Texas bar in 1878 and commenced practice in Palestine, Texas.

Gregg served in the Texas Senate between 1886 and 1888. He ran for Texas's 7th congressional district, and held a seat there between 1903 - 1919. He served as Chairman of the Committee on War Claims (1913–1919). He did not run for re-election in 1918 and died a month after his term ended in Palestine, Texas, and is buried in East Hill Cemetery.