Monitor is a small unincorporated community in Perry Township, Tippecanoe County, in the U.S. state of Indiana.
The town's original name was Cynthyana.
A post office was established at Monitor in 1864, and remained in operation until it was discontinued in 1902.
The former Monitor High School, since closed to school consolidation, fielded a basketball team which won a sectional championship in 1943 despite the community's small size. They defeated Lafayette Jefferson, who would go on to set a state record by winning the next 29 consecutive sectional championships between 1944 and 1972.
The former Monitor schoolhouse was used as a drug addiction treatment facility until 2007. In 2010 it was set on fire in an arson incident.