Across the Plains is a 1939 American Western film directed by Spencer Gordon Bennet and starring Addison Randall, Frank Yaconelli, and Joyce Bryant.

Written by Robert Emmett Tansey, the film is about two brothers who are separated when they are young and who meet again as adults, one good and one bad.

When they grow up, Jack (Randall) is protecting a shipment of gold, while Jimmy (Moore), now known as the "Kansas Kid," works with the gang of outlaws to steal it.

The two clash in the attempted robbery, but before the two men can kill each other, Buckskin, the old wagon train master from their childhood, reveals their true relationship to one another.

An exciting final shootout ensues between the two brothers and the outlaws, and Jimmy is killed by Gordon's gang.