The City of Los Angeles is the most populous city in California and the second most populous city in the United States. It is located in the southern part of the state and is home to over four million people. Ontario, Simi, and Pomona are all cities located within the greater Los Angeles area. Ontario is a city of seven letters, Simi is a city of four letters, and Pomona is a city of six letters. All three cities are located in Los Angeles County and are part of the larger metropolitan area.