Sydney Montanez of New Britain, Connecticut, is a long-term missing person whose disappearance remains unresolved. She was a young mother of three and described as a petite woman with brown hair. The date she was last seen is unclear in accounts, with conflicting reports placing her disappearance sometime in the mid to late 1980s or possibly the early 1990s.

One lead that drew investigators’ attention was a Jane Doe found in 1991 who initially appeared to share some physical similarities with Sydney. DNA testing later excluded that Jane Doe as Sydney, and other leads have not produced a confirmed identification. Sydney’s daughter was a baby at the time of the disappearance and grew up with little information about her mother; relatives’ conflicting recollections have complicated efforts to reconstruct Sydney’s life and last movements.

Anyone who knew Sydney, where she lived, worked, or spent time in New Britain during the 1980s–1990s, or who has information about her disappearance, is asked to come forward.