Monticello is a city in White County, Indiana, United States. The population was 5,378 at the 2010 census. The city is the county seat of White County.
Monticello is known as a tourist destination in north-central Indiana and is home to the Indiana Beach amusement park, Lake Shafer, and Lake Freeman.
Monticello is located at 40°44′48″N 86°45′55″W / 40.74667°N 86.76528°W / 40.74667; -86.76528 (40.746709, -86.765359).