NCSL can refer to several things:
National College for School Leadership – British government-funded Non-Departmental Public Body for head teachers and school leaders National Conference of State Legislatures – non-governmental organization for members and staff of US state legislatures New Caledonia Super Ligue, top division association football league of New Caledonia New Caledonia Second Level, second division association football league of New Caledonia NCSL International – non-profit organization concerned with metrology and related fields Nashville, Chattanooga and St. Louis Railway - American railway which operated from 1851-1957