Harlan Carey Brewster (November 10, 1870 – March 1, 1918) was a politician in British Columbia, Canada.

Brewster arrived in British Columbia in 1893 and had various careers working on a ship and then in a cannery.

Brewster promised to end patronage in the civil service, end political machines, improve workmen's compensation and labour laws, bring in votes for women, and other progressive reforms.

In government, Brewster brought in women's suffrage, instituted prohibition, and combatted political corruption before his unexpected death in 1918.

He is interred in the Ross Bay Cemetery in Victoria, British Columbia.