Our Colteryahn Dairy Heritage

Colteryahn Dairy, the oldest dairy in Pittsburgh is steeped in a long, rich history from the 1870's when the founder, William Colteryahn arrived in Pittsburgh with his family from Hamburg, Germany.

At the time the dairy was established in 1893, milk was being received from farmers by train and was distributed over the area in large containers on wagons. Housewives would come to the wagon with their kettles and pans to purchase the milk.

In 1917, William's son, Carl opened the Colteryahn Dairy on its present site on Brownsville Road in Carrick, Pennsylvania. For many years, home delivery was the main business activity. As Divco milk trucks replaced the horse and wagon, the business quickly expanded to selling fresh milk to retail markets while continuing to deliver to homes throughout the area.

In the 1960's, Carl Jr. had the foresight to enter into the convenience store business as the consumer demand for quick trip convenience purchases began. In 1962, through the franchise arrangement with Stop-N-Go Food Stores, the first convenience store was opened on South Park Road in Bethel Park, and remains open today.

In 1984, the Stop-N-Go franchise was dropped and the stores were changed to a Colteryahn Dairy franchise operation named CoGo's.

In 1988, Carl Jr. and Carl III completed a three year, five million dollar plant and cooler expansion project. This state-of-the-art facility was featured as the 1998 Plant of the Year by Dairy Foods Magazine in the 2001 issue.

In 2003, because of the Colteryahn families strong commitment to community and expansion, the City of Pittsburgh issued a Proclamation and declared June 20 Colteryahn Dairy Day.

Today, Colteryahn Dairy is the only surviving dairy in Pittsburgh and continues to be the parent company of the successful CoGo's convenience store chain.

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