Ronnie Gene Brown (born December 12, 1981 in Rome, Georgia) is an American football running back for the Miami Dolphins of the National Football League. He was drafted by the Dolphins second overall in the 2005 NFL Draft. He played college football at Auburn.

Brown attended Cartersville High School in Georgia, where he was a three-year starter and rushed for 936 yards, 12 touchdowns. In his senior year, he earned the Georgia Class 2A Player of the Year award when he gained 1,931 yards on 206 carries and scored 25 touchdowns. That year, 1999, Brown led Cartersville to a state championship over Hart County - their first since 1991. During his high school career, he was selected to the PrepStar All-America team. He also played free safety and had three interceptions in his senior year.

Brown was also an accomplished baseball player and was drafted by the Seattle Mariners out of high school.