The collection consists of material accumulated by the Coquitlam Heritage Society over the course of its existence. The collection includes the following: records related to Fraser Mills (later the Canadian Western Lumber Company, then Crown Zellerbach) including ledger books, journals, statements, photographs, and various other records; records related to the lumber industry in Coquitlam; photographs of historic Coquitlam; glass plate negatives by W.J. Moore and Richard Broadridge; material related to the administration of the Coquitlam Heritage Society itself; and miscellaneous records related to Coquitlam's history

The series consists of the following: A copy of the submission to the Canada Royal Commission on Bilingualism and Biculturalism entitled "Maillardville French-Canadians"; several copies of the Maillardville Official Community Plan; a copy of the program for the Millside School's 80th Anniversary; a Parish Report from Notre Dame de Lourdes; a history of the Maillardville pioneers; Commercial design guidelines for Maillardville; and a copy of the "Bonjour Maillardville" newsletter from the Société Maillardville-Uni.

The series consists of minute books, notebooks, and correspondence relating to the Parent Teacher Association Council for School District No. 43.