I Start Counting is a 1966 thriller novel by the British writer Audrey Erskine Lindop. With a serial strangler on the loose in her small English town, a teenage girl begins to suspect who it is.
In 1970 it was another of Lindop's novels which was adapted into a film of the same title directed by David Greene and starring Jenny Agutter and Simon Ward. Others have been I Thank a Fool, and The Singer Not the Song.