Needles is a city located in the Mojave Desert on the western banks of the Colorado River in San Bernardino County, California. It is located in the Mohave Valley, which straddles the California–Arizona border. The city is accessible via Interstate 40 and U.S. Route 95. The population was 4,844 at the 2010 census, up from 4,830 at the 2000 census. Needles was named after "The Needles", a group of pointed rocks on the Arizona side of the river.