Galliker Dairy Company was founded on March 25, 1914, when Louis Galliker purchased the Shreve Ice Cream Company. The new company was first known as the Galliker Ice Cream Company.

Ice cream was the firm's only product until competition forced the company into the milk business in 1925. In the early days, the firm made ice cream at 451-453 Franklin Street and processed milk and had its garage at the corner of Haynes and Sherman Streets, Johnstown. Louis Galliker died in January 1937, and was succeeded by his widow, Pauline H. Galliker, who had been active in the business from its founding.

The company purchased a property on Napoleon Street for garage purposes in 1940. In 1943, the company changed its name to the Galliker Dairy Company. In 1946, William M. Galliker was elected President and Louis G. Galliker, Jr., was elected Secretary-Treasurer. In 1965, Louis G. Galliker, Jr., died and in 1968, William M. Galliker retired. At that time, Louis G. Galliker III assumed leadership of the company. As of June 28, 2002, Charles D. Price became President of the firm and Louis G. Galliker III, the Chairman.

A new plant was opened in the Johnstown Industrial Park in late 1973. A processing plant was purchased in Cumberland, Maryland in March 1984.

In March 1990, Galliker became one of the first dairies in the country to offer its milk in a container that protects the milk from the adverse effects of light. The innovation was trademarked the "Lightsafe Yellow Jug." In 1998, the company introduced single service plastic bottles in quarts, pints and half pints, trademarked as My Milk®, My Tea™, and My Juice™.

Today the company distributes its products throughout major portions of central and western Pennsylvania and Maryland and parts of Ohio, Virginia, West Virginia, New Jersey, New York, and North Carolina.

The dairy is associated with the Quality Chekd Dairies Inc., of Naperville, Illinois, a cooperative owned by its dairy members.