| Office: | 23rd Lieutenant Governor of North Carolina |
| Termend: | January 5, 1961 |
| Termstart: | 1957 |
| Preceded: | Luther H. Hodges |
| Succeeded: | Harvey Cloyd Philpott |
| Governor: | Luther H. Hodges |
| Birth Date: | November 29, 1903 |
| Birth Place: | Concord, North Carolina |
| Office2: | Member of the North Carolina Senate from the 21st District |
| Alongside2: | Nelson Woodson |
| Termstart2: | 1945 |
| Termend2: | 1956 |
Luther Ernest Barnhardt (November 29, 1903 – June 1, 1980) was an American politician in the state of North Carolina. He served as the 23rd lieutenant governor of North Carolina from 1957 to 1961 under Governor Luther H. Hodges.
Barnhardt was born on November 29, 1903, in Concord, North Carolina. One of five children, his parents were George Thomas and Lily Faggart Barnhardt. He received both his bachelors of laws and juris doctor degrees from Wake Forest University. He was an attorney in Concord for 52 years and chair of the Cabarrus Board of Elections for a decade.[1]
A Democrat, Barnhardt was a member of the North Carolina Senate for five terms beginning in 1944 as a representative for Cabarrus and Rowan counties.[2] He was elected president of the state senate in 1953, a position he held for three years. When the governor William B. Umstead died and Luther H. Hodges replaced him, Barnhardt was elected lieutenant governor in 1956. After his term expired, he chose not to seek election to any public office. In 1977, Barnhardt retired his law practice.
Barnhardt was married to Burvelle MacFarland Barnhardt and the couple had two sons and two daughters. He died on June 1, 1980, at a nursing home in Charlotte, North Carolina.[3] He is buried at Carolina Memorial Park in Concord.