Jorge Simon, 26, a native of Guatemala, was last seen in the area of Stillwater Avenue and Finney Lane.
He is 26 years old, about 5-foot-7 and weighs 170 pounds, police said.
He has brown eyes and black hair and has a tattoo of a bird on his right shoulder.
Anyone with information about the disappearance is asked to call the Stamford Police Department at 203-977-4444.
Click here to follow Daily Voice Westport and receive free news updates.