Los Alamos is a small city located in Los Alamos County, New Mexico, United States. It is situated in the northern part of the state and is known for being the site of the Los Alamos National Laboratory, where the first atomic bomb was developed during World War II as part of the Manhattan Project. The city has a population of approximately 12,019 people as of the 2020 census. Los Alamos is known for its natural beauty, with nearby national forests and outdoor recreational opportunities. It is also home to the Bradbury Science Museum, which showcases the history of the Manhattan Project and the laboratory's ongoing scientific research.