APU/Citrus College station is an at-grade light rail station on the A Line of the Los Angeles Metro Rail system. It is located between Palm Drive and Citrus Avenue, a block north of Foothill Boulevard, in Azusa, California. It is named after the nearby Azusa Pacific University (APU) and Citrus College.

The A Line is a 48.5-mile (78.1 km) light rail line in Los Angeles County, California. It is one of the six lines of the Los Angeles Metro Rail system, operated by the Los Angeles County Metropolitan Transportation Authority (Metro). The A Line serves 44 stations and runs east-west between Azusa and Pasadena, then north-south between Pasadena and Long Beach. It interlines and shares five stations with the E Line in Downtown Los Angeles. Service operates for approximately 19 hours with headways of up to 8 minutes during peak hours. The A Line is currently the longest light rail line in the world.