The ampm brand (rarely "am/pm") is a convenience store chain with branches located in several U.S. states, including Arizona, California, Nevada, Oregon, Washington, recently in Kentucky, Illinois, Indiana, Georgia, Ohio, Pennsylvania, and Florida, and in several countries worldwide, including Japan. The ampm brand is owned by BP America, Inc., a subsidiary of BP, which acquired its founding owner, Atlantic Richfield Company (ARCO), in 2000. In the US, the stores are usually attached to an ARCO or BP-branded gas station. The first locations opened in Southern California in the late 1970s.

Franchised and BP-owned units of ampm are also found in parts of Mexico, usually co-located with a Pemex gas station, Costa Rica and Brazil, usually attached with an Ipiranga station. In Argentina and Chile they can be found in Repsol-YPF/ACA stations.

In Spring 2008, U.S. branches of the BP Connect brand of convenience stores rebranded to ampm, which also brought the brand under the BP banner after exclusively being under the ARCO banner. The subsequent decision saw markets with a large BP presence, such as Chicago, Cleveland, Indianapolis, Orlando, and Pittsburgh, instantly have ampm stores and subsequent TV ads in those markets, in order to establish the brand.