Delta is a city in Keokuk County, Iowa, United States.

[3] According to the United States Census Bureau, the city has a total area of 0.93 square miles (2.41 km2), all of it land.

There were 157 housing units at an average density of 163.9 per square mile (63.3/km2).

There were 172 housing units at an average density of 184.9 per square mile (71.4/km2).

45.2% of all households were made up of individuals, and 18.5% had someone living alone who was 65 years of age or older.

There were 191 housing units at an average density of 191.3 per square mile (73.9/km2).

35.5% of all households were made up of individuals, and 19.8% had someone living alone who was 65 years of age or older.

[9] The community of Delta was, like hundreds of towns and villages, served by an expanded Rock Island system.