They say 36-year-old Catherine Campbell was last seen at 6:30 a.m. on Sept. 10 in Dartmouth.
Campbell is described as a white woman with a medium build, blonde hair and blue eyes.
She is a member of the police department in Truro, N.S.
Police say they do not suspect foul play in the matter, but add that there is concern for her well-being.
Const. Stacey Opalka of the Halifax police says it is out of character for Campbell to disappear, but would not say if someone reported her missing.