Roxanne Marie Sims was 19 when she vanished from Portland, Oregon in an uncertain timeframe around 1977. The exact date and circumstances of her disappearance are not known, and there are no publicly documented witnesses or a precise timeline.

Roxanne was five feet six inches and about 125 pounds, with light brown, straight, shoulder-length hair. She sometimes wore a large light brown Afro-style wig, a short multi-patched faux fur jacket, and brown wooden high-heel platform shoes. A small, possibly horseshoe-shaped scar may have been to the side of her right eye. The Portland Police Bureau keeps her case file and she is listed with the National Missing and Unidentified Persons System.

Few concrete leads have emerged over the decades and the investigation remains open. If anyone in Portland from the late 1970s remembers Roxanne, her style, where she worked or socialized, or has any information about her disappearance, please share what is known with the Portland Police Bureau.