Elwood is a city in Doniphan County, Kansas, United States. As of the 2010 census, the city population was 1,224. It is part of the St. Joseph, MO–KS Metropolitan Statistical Area.
Elwood is located at 39°45′13″N 94°52′42″W / 39.75361°N 94.87833°W / 39.75361; -94.87833 (39.753544, -94.878345). According to the United States Census Bureau, the city has a total area of 2.0 square miles (5.3 km²), all of it land.
As of the census of 2000, there were 1,145 people, 446 households, and 313 families residing in the city. The population density was 562.9 people per square mile (217.8/km²). There were 494 housing units at an average density of 242.9 per square mile (94.0/km²). The racial makeup of the city was 89.08% White, 6.64% African American, 0.26% Native American, 0.44% Asian, 0.35% from other races, and 3.23% from two or more races. Hispanic or Latino of any race were 1.48% of the population.