Long Beach Transit (LBT) is a municipal transit company providing fixed and flexible bus transit services in Long Beach, California, United States, in other communities in south and southeast Los Angeles County, and northwestern Orange County. Long Beach Transit also operates the Passport shuttle, Aquabus, and Aqualink. The service, while operated on behalf of the City of Long Beach, is not operated directly by the city, but by a separate nonprofit corporation, the Long Beach Public Transportation Company, operated for that purpose. In 2023, the system had a ridership of 17,780,100, or about 60,800 per weekday as of the fourth quarter of 2023.

Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States, with 9,861,224 residents estimated in 2022. Its population is greater than that of 40 individual U.S. states. Comprising 88 incorporated cities and many unincorporated areas within a total area of 4,083 square miles (10,570 km2), it is home to more than a quarter of Californians and is one of the most ethnically diverse U.S. counties. The county's seat, Los Angeles, is the second most populous city in the United States and the most populous city in California, with 3,822,238 residents estimated in 2022. It is also known for being the home of the American film and television industry, a distinction it has held since the early 20th century which has given the county global prominence.