Keswick is a city in Keokuk County, Iowa, United States. The population was 246 at the 2010 census.
The Burlington, Cedar Rapids and Northern Railway built a 66-mile branch to What Cheer via Keswick in 1879 The town is named for Keswick, England, the home town of a local woman who had offered lodging to the track-laying crew.
Keswick is located at 41°27′14″N 92°14′20″W (41.453941, -92.238818).
According to the United States Census Bureau, the city has a total area of 0.43 square miles (1.11 km2), all of it land.
As of the census of 2010, there were 246 people, 105 households, and 69 families residing in the city. The population density was 572.1 inhabitants per square mile (220.9/km2). There were 118 housing units at an average density of 274.4 per square mile (105.9/km2). The racial makeup of the city was 97.6% White, 1.2% Native American, and 1.2% from two or more races.
There were 105 households, of which 27.6% had children under the age of 18 living with them, 49.5% were married couples living together, 10.5% had a female householder with no husband present, 5.7% had a male householder with no wife present, and 34.3% were non-families. 28.6% of all households were made up of individuals, and 18.1% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.87.
The median age in the city was 38.3 years.