He served two terms in the Louisiana House of Representatives from 1900 to 1908. and a single term in the Louisiana State Senate from 1908 to 1912, representing Bienville and neighboring Claiborne parishes. Wimberly served on the Education committees of both houses during his 12-year tenure. Wimberly was the youngest of eleven children of the former Francis Nix and John L. Wimberly, a planter and a native of Georgia who migrated westward to Louisiana in 1840.
Rush Wimberly graduated from Arcadia High School, an entity of the Bienville Parish School Board.
Having privately thereafter studied the law, he was admitted to the bar in 1894. After his legislative years, Wimberly moved to Shreveport in Caddo Parish in northwestern Louisiana, where he formed the law firm, Wimberly, Reeves and Dorman.
He returned to Arcadia and for ten years was the parish attorney for Bienville Parish and for a number of years the parish public school superintendent. Wimberly was an alternate delegate to the 1936 Democratic National Convention, which met in Philadelphia to renominate the Roosevelt-Garner ticket.
The oldest, Lorris M. Wimberly, served in the state House, including several stints as Speaker.
The other Wimberly children were J. Rush Wimberly, Junior. (1906-1982), an attorney, and Edrie West. Albrecht (1902-1983), the wife of Henry Gustave Albrecht (1899-1945) of Arcadia. Wimberly and most of his family are interred at the Arcadia Cemetery.