In 2001, the last year that Forest was a national census unit, the town had a population of 2,857. The average age of the people who live in Forest was about 42. This is five years older than the average for the entire province. The average earnings of the people living in Forest was $27,902 (CAD) in the year 2000. In 2006, the local census unit was changed to the town of Lambton Shores. Information for Forest itself is not available.