Ellinwood is a city in the southeast corner of Barton County, Kansas, United States. The population was 2,164 at the 2000 census.
In 1878, Atchison, Topeka and Santa Fe Railway and parties from Marion County and McPherson County chartered the Marion and McPherson Railway Company. In 1879, a branch line was built from Florence to McPherson, in 1880 it was extended to Lyons, in 1881 it was extended to Ellinwood. The line was leased and operated by the Atchison, Topeka and Santa Fe Railway. The line from Florence to Marion, was abandoned in 1968. In 1992, the line from Marion to McPherson was sold to Central Kansas Railway. In 1993, after heavy flood damage, the line from Marion to McPherson was abandoned. The original branch line connected Florence, Marion, Canada, Hillsboro, Lehigh, Canton, Galva, McPherson, Conway, Windom, Little River, Mitchell, Lyons, Chase, Ellinwood.
Ellinwood is located at 38°21′22″N 98°34′51″W / 38.356226°N 98.580873°W / 38.356226; -98.580873 (38.356226, -98.580873). According to the United States Census Bureau, the city has a total area of 1.1 square miles (2.8 km2), all of it land. The city is situated along the path of the historic Santa Fe Trail. Ellinwood is also located just north of the Arkansas River, roughly in the area where it makes its "great bend" to the southeast en route to its final destination, the Mississippi River.