The Port of Long Beach, also known as the Harbor Department of the City of Long Beach, is the second-busiest container port in the United States, after the Port of Los Angeles, which it adjoins. Acting as a major gateway for US–Asian trade, the port occupies 3,200 acres (13 km2) of land with 25 miles (40 km) of waterfront in the city of Long Beach, California. The Port of Long Beach is located less than two miles (3 km) southwest of Downtown Long Beach and approximately 25 miles (40 km) south of Downtown Los Angeles. The seaport generates approximately US$100 billion in trade and employs more than 316,000 people in Southern California.