Downey is a city located in southeast Los Angeles County, California, United States, 13 mi (21 km) southeast of downtown Los Angeles. It is considered part of the Gateway Cities. The city is the birthplace of the Apollo space program. It is also the home of the oldest still operational McDonald's restaurant in the world. As of the 2010 census, the city had a total population of 111,779.
According to the United States Census Bureau, the city has a total area of 12.6 square miles (33 km2). 12.4 square miles (32 km2) of it is land and 0.2 square miles (0.52 km2) of it (1.27%) is water.
Source: Wikipedia (as of 04/11/2019). Read more from Wikipedia