Covina is a city in the San Gabriel Valley region of Los Angeles County, California, United States, about 22 miles (35 km) east of downtown Los Angeles. The population was 51,268 according to the 2020 census, up from 47,796 at the 2010 census. The city's slogan, "One Mile Square and All There", was coined when the incorporated area of the city was only one square mile (2.6 km2).