Interlachen is a town in Putnam County, Florida, United States. The population was 1,475 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 1,497. The word Interlachen means 'between the lakes' Interlachen apartments for rent comparison page shows most up to date rent information on Interlachen apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.