Grandin is an unincorporated village located in the U.S. state of Florida. It is within Putnam County close to the State Road 100/County Road 315 intersection. It has a total area of 5.7 square miles at 29°43′39″N 81°55′07″W. As of the 2000 census data, it had a total population of 192. Due to its famous sand and rock plants, the Florida Rock Industries Inc. uses Grandin as a primary source of undifferentiated sand.