Port Brewing Company is a craft brewery headquartered in San Marcos, California.

In 2006, Pizza Port owners Vince and Gina Marsaglia expanded the beer production in a brewing facility formerly owned by Stone Brewing Company in San Marcos.

This existing brewery space led to an increase the amount of beers available for distribution.

The new brewery project was named Port Brewing Company, LLC.

[3] The brewery and head brewer Tomme Arthur were named Small Brewery of the Year at the 2007 Great American Beer Festival[4] and 2008 Champion Brewery and Champion Brewer in the Small Brewing Company Category at the World Beer Cup.