Colonial Automobile Company was an American automobile manufacturer based in Indianapolis, Indiana, operational from 1917 to 1921. The company focused on producing a limited number of vehicles, primarily touring models, during its brief existence.

The vehicles produced by Colonial were notable for their use of a six-cylinder overhead valve engine, which was a relatively advanced feature for the time. The cars had a wheelbase of 116 inches (2944 mm), providing a spacious interior for passengers. Pricing for these automobiles began at $995, positioning them within the mid-range market segment of the era.

Despite the innovative engineering and design, Colonial Automobile Company faced challenges in the competitive automotive market, resulting in a low production volume. The company ceased operations after just a few years, leaving behind a small legacy in the early automotive industry.