The Cambridge Retirement System (CRS) is one of 106 contributory retirement systems in the Commonwealth of Massachusetts.  The Retirement System, governed by a five member board, is subject to the provisions of Massachusetts General Laws Chapter 32.

The CRS´s members are actively working for the City of Cambridge, Cambridge Housing Authority, Cambridge Public Health Commission and Cambridge Redevelopment Authority or are retired from one of the above entities.  Membership in the Cambridge Retirement System is mandatory for nearly all half-time and full-time employees.