Menifee, California is a city in southwestern Riverside CountyCaliforniaUnited States and part of the Los Angeles Combined Statistical Area. Located nearly 8 miles (13 km) north of Murrieta, the city is roughly 50 square miles (100 km2) in size. It had a population of about 77,519 at the 2010 United States Census, and is anticipated to reach 100,000 by 2020.[citation needed] The incorporated City of Menifee includes the communities of Menifee, Sun City, Quail Valley, Paloma Valley and portions of Romoland.