Mary Lou Conrad was 51 and living in Plymouth, Pennsylvania, when she was last seen on January 1, 1990. She is described as 5 feet 6 inches tall, about 175 pounds, with black hair and brown eyes. Official records list her last contact as occurring in the early 1990s, but offer no further detail about her movements that day or the circumstances of her disappearance.

Her case was entered into the National Missing and Unidentified Persons System on February 4, 2013. The Pennsylvania State Police are handling the investigation, which remains open. Public information is sparse and does not set out leads or a timeline of her last known days.

If anyone knew Mary Lou Conrad, saw her around January 1, 1990, or has any information about her whereabouts, please share what is known with the Pennsylvania State Police.