Delta is a city in Keokuk County, Iowa, United States. The population was 410 at the 2000 census.

Delta is located at 41°19′27″N 92°19′46″W / 41.32417°N 92.32944°W / 41.32417; -92.32944 (41.324112, -92.329481).

According to the United States Census Bureau, the city has a total area of 1.0 square mile (2.6 km²), all of it land.

As of the census of 2000, there were 410 people, 172 households, and 99 families residing in the city. The population density was 410.6 people per square mile (158.3/km²). There were 191 housing units at an average density of 191.3 per square mile (73.7/km²). The racial makeup of the city was 98.29% White, 1.22% from other races, and 0.49% from two or more races. Hispanic or Latino of any race were 1.71% of the population.

There were 172 households out of which 26.2% had children under the age of 18 living with them, 43.6% were married couples living together, 7.6% had a female householder with no husband present, and 42.4% were non-families. 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. The average household size was 2.38 and the average family size was 3.09.

Iowa (ⁱ/ˈaɪ.əwə/) is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New France. After the Louisiana Purchase, settlers laid the foundation for an agriculture-based economy in the heart of the Corn Belt. Iowa is often known as the "Food Capital of the World".

In the latter half of the 20th century, Iowa's agricultural economy transitioned to a diversified economy of advanced manufacturing, processing, financial services, biotechnology, and green energy production. Iowa is the 26th most extensive and the 30th most populous of the 50 United States. Its capital and largest city is Des Moines. Iowa has been listed as one of the safest states to live in.

Iowa is bordered by the Mississippi River on the east; the Missouri River and the Big Sioux River on the west; the northern boundary is a line along 43 degrees, 30 minutes north latitude. The southern border is the Des Moines River and a not-quite-straight line along approximately 40 degrees 35 minutes north, as decided by the U.S. Supreme Court in Missouri v. Iowa after a standoff between Missouri and Iowa known as the Honey War.