Elmwood is a city in Peoria County, Illinois, United States. The population was 2,097 at the 2010 census. Elmwood is part of the Peoria, Illinois Metropolitan Statistical Area.
The settlement is named after the mansion of William J. Phelps.
On the night of June 5, 2010, an elephant trunk tornado touched down in Elmwood, destroying city hall and other area buildings, bringing down limbs and power lines, and damaging the roof of a theater. There are plans to rebuild some of their most treasured buildings, such as the community center and city hall. Although Elmwood suffered a great deal from the tornado, many town businesses re-opened.
Elmwood is located at 40°46′42″N 89°58′6″W (40.778378, -89.968355).
According to the 2010 census, Elmwood has a total area of 1.43 square miles (3.70 km2), all land.
As of the 2000 United States Census, there were 1,945 people, 772 households, and 565 families residing in the city. The population density was 1,577.1 people per square mile (610.5/km2). There were 806 housing units at an average density of 653.5 per square mile (253.0/km2).