The Great-West Life Assurance Company (also Great-West Life, French: La Great-West, compagnie d'assurance-vie) is a life insurance company. Its headquarters are in Winnipeg, Manitoba. Its President and CEO is Paul A. Mahon.

It is owned by Great-West Lifeco, which also owns London Life Insurance Company, Canada Life Financial, Great-West Life & Annuity Insurance Co., and Putnam Investments.

GWL Realty is the Toronto based property and asset management arm of the Great West Life established in 1993.