Chelsea is a town in Rogers County, Oklahoma, United States. The population was 1,964 at the 2010 census, a decline of 8.3 percent from the figure of 2,136 recorded in 2000. Chelsea was named after the area in London, England, by Charles Peach, a railroad official who was a native of London. The town was the site of the Chelsea-Alluwe Oil Field, which produced a significant amount of oil from circa 1910 until the early 1920s, before it played out.