Raevynn L Thomas was abducted in Grandview around 8.30pm on Thursday by a 40-year-old male suspect.
The alert issued by the Illinois State Police reads: "A one year old infant was abducted in a vehicle stolen from 2264 North Grand Ave East in Grandview Illinois around 8.30pm this evening.
"Raevynn L Thomas is a black one year old female who weighs 25 pounds and has black hair.
"She is wearing a pink sleeper with white polka dots.
"The female infant was secured in a car seat inside the vehicle when Curtis Gibbs was observed driving off in the vehicle.
"Curtis Gibbs is a black male who is bald and 40 years old.
"Curtis Gibbs is wearing a dark sweatshirt over a white shirt, black pants, and white shoes.
"The vehicle is a silver 2016 Nissan Pathfinder with Illinois license B L 5 6 6 3 9.
"The vehicle was last seen heading eastbound on North Grand Avenue East in Grandview."
Gibbs has been described as having brown eyes with a height of 6'0" and weighting 170 lbs.