The Little River is a river in Central Texas in the Brazos River watershed. It is formed by the confluence of the Leon River and the Lampasas River near Little River, Texas in Bell County. It flows generally southeast for 75 miles until it empties into the Brazos River about five miles southwest of Hearne, at a site called Port Sullivan in Milam County. The Little River has a third tributary, the San Gabriel River, which joins the Little about eight miles north of Rockdale and five miles southwest of Cameron. Cameron, the county seat of Milam County and the only city of any significant size on the Little River, was established in 1846.