Laureen Ann Rahn (April 3, 1966 – disappeared April 26 or April 27, 1980) is an American teenager who vanished under mysterious circumstances from her home in Manchester, New Hampshire. On the night of her disappearance, Rahn was accompanied by a male and female friend at the apartment she shared with her mother, Judith, who was out on a date with her boyfriend.

At some point during the evening, Rahn's male friend left the apartment after hearing voices in the hallway, assuming Rahn's mother was returning home. Her female friend remained at the apartment. Upon Judith's arrival home after midnight, she found that all of the lightbulbs in the apartment building's hallways had been unscrewed, leaving the halls completely dark. In the apartment, Judith saw a figure sleeping in her daughter's bed and assumed it to be her; however, she then discovered it was in fact Rahn's female friend who had slept in the bed. Her friend claimed to have seen Rahn going to sleep on the couch.

In the months after Rahn's disappearance, Judith was billed for numerous phone calls from an unidentified caller, which were placed from motels in Santa Ana and Santa Monica, California. Karole Jensen, an investigator from the association Wings for Children, uncovered that one of these motels had been suspected of hosting the production of child pornography, but it was never confirmed that Rahn had been at either motel. Rahn's mother continued to receive anonymous calls in the ensuing years before eventually changing her phone number.