Dylan Carter — a singer from South Carolina who once competed on “The Voice” — was killed in a car crash Saturday … and TMZ has learned his cause of death.

The Colleton County coroner tells us … the 24-year-old died of blunt force injuries sustained in the violent crash … and his death has been ruled accidental. It was noted that Dylan was wearing his seatbelt.

Law enforcement told TMZ … a 2026 Tesla sedan was traveling southbound on U.S. Route 21 in South Carolina just after 11 PM when it veered off the road, striking a pole and a fence, before rolling. The driver was the only person in the car … they succumbed to their injuries at the hospital. The coroner confirmed Dylan was the driver.

Dylan appeared on Season 24 of “The Voice” in 2023 … he was on the show for a couple of weeks after his blind audition made all four judges turn their chairs around in a show of support … singing Whitney Houston‘s “I Look to You.”

On “The Voice,” Dylan picked Reba McEntire as his coach. He told the judges he’d loved music since he was a little kid and his audition was a tribute to his mom, who died the year before his audition. Reba also posted a tribute about his passing.

Dylan grew up in St. George, South Carolina … about 50 northwest of Charleston.

He was only 24.