List of school districts numbered 18

School District 18 may refer to, among other things:

United States

 * Wells-Ogunquit Community School District 18, in Maine
 * Garden City Union Free School District 18, in New York
 * Plainedge Union Free School District, in New York
 * Blue Ridge Community Unit School District 18, in Illinois
 * Fairmount School District 18, in Wyoming
 * Apache County School District No. 18, in Arizona
 * Cochise County School District No. 18, in Arizona
 * Greenlee County School District No. 18, in Arizona

Canada

 * Black Gold Regional Division No. 18, in Alberta
 * New Brunswick School District 18
 * School District 18 Golden, in British Columbia