Sachem Central School District encompasses the CDPs that include the hamlet in the New York county of Suffolk.
 Founded in 1955, the district now encompasses residents of the Census-Designated Places of Holbrook, Holtsville and Farmingville, as well as some parts of Lake Grove, Lake Ronkonkoma, Ronkonkoma, Nesconset, and Bohemia. 
Holbrook is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States. 
