Twentynine Palms (also 29 Palms) is a city in San Bernardino County, California, United States. The population was 14,764 at the 2000 census. Geography Twentynine Palms is located at (34.138277, -116.072409). According to the United States Census Bureau, the city has a total area of 142.0 km² (54.8 mi²), all land. Twentynine Palms is a desert and mountain area. It is home of Joshua Tree National Park and Park Headquarters, and Marine Corps Air Ground Combat Center Twentynine Palms, the world's largest Marine Base. It is located approximately half way between Los Angeles, CA and Las Vegas, NV (using the 10 and 15). History Twentynine Palms was named for the palm trees located in the Oasis of Mara, at the Joshua Tree National Park headquarters. When the area was settled by gold miners in the late nineteenth century, there were 29 palm trees growing in the oasis, most of w