Alexis Vidler was last seen at her home on Tapadero Drive in Celina, 40 miles north of Dallas, on 2 January.
She is described as being 5’5’ (1.65m) tall, weighing 138 pounds (63kgs), with hazel eyes and brown hair.
The Texas Department of Safety said authorities were seeking a black 2022 Mitsubishi Mirage with a RYT5102 licence plate.
Authorities believe she was abducted and may be in grave or immediate danger, according to KWTX. They have not identified a suspect.
Anyone with information is asked to call the Celina Police Department at 972-382-2121.