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Grand Mound, Iowa
City welcome sign
City welcome sign
Location of Grand Mound, Iowa
Location of Grand Mound, Iowa
Country  United States
State  Iowa
County Clinton
 • Total 1.87 sq mi (4.85 km2)
 • Land 1.87 sq mi (4.85 km2)
 • Water 0.00 sq mi (0.00 km2)
725 ft (221 m)
 • Total 615
 • Density 328.70/sq mi (126.88/km2)
Time zone UTC-6 (Central (CST))
 • Summer (DST) UTC-5 (CDT)
ZIP code
Area code(s) 563
FIPS code 19-32025
GNIS feature ID 0457024

Grand Mound is a city in Clinton County, Iowa, United States. The population was 615 at the time of the 2020 census.


The Chicago, Iowa and Nebraska Railroad was built through the town site in 1858, and a train station was built. Grand Mound was platted in 1866. Grand Mound was named for nearby Sand Mound; a recording error accounts for the error in spelling, which was never corrected.


Grand Mound is located at 41°49′27″N 90°38′49″W / 41.82417°N 90.64694°W / 41.82417; -90.64694 (41.824275, -90.646815).

According to the United States Census Bureau, the city has a total area of 1.82 square miles (4.71 km2), all of it land.


Historical populations
Year Pop. ±%
1880 234 —    
1890 247 +5.6%
1900 355 +43.7%
1910 428 +20.6%
1920 463 +8.2%
1930 438 −5.4%
1940 526 +20.1%
1950 526 +0.0%
1960 565 +7.4%
1970 627 +11.0%
1980 674 +7.5%
1990 619 −8.2%
2000 676 +9.2%
2010 642 −5.0%
2020 615 −4.2%
Source: and Iowa Data Center
U.S. Decennial Census
Grand MoundIowaPopPlot
The population of Grand Mound, Iowa from US census data
Grand Mound, Iowa Fire Dept
Volunteer Fire Department

2010 census

As of the census of 2010, there were 642 people, 243 households, and 185 families residing in the city. The population density was 352.7 inhabitants per square mile (136.2/km2). There were 253 housing units at an average density of 139.0 per square mile (53.7/km2). The racial makeup of the city was 98.9% White, 0.3% Asian, and 0.8% from two or more races. Hispanic or Latino of any race were 1.7% of the population.

There were 243 households, of which 34.6% had children under the age of 18 living with them, 63.4% were married couples living together, 7.8% had a female householder with no husband present, 4.9% had a male householder with no wife present, and 23.9% were non-families. 16.9% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 2.99.

The median age in the city was 39.5 years. 24.1% of residents were under the age of 18; 10.4% were between the ages of 18 and 24; 23.4% were from 25 to 44; 28.3% were from 45 to 64; and 13.6% were 65 years of age or older. The gender makeup of the city was 50.9% male and 49.1% female.


Grand Mound is part of the Central DeWitt Community School District, based in DeWitt, known as the Central Clinton Community School District until July 1, 2014.

Until 2001, elementary-aged students attended Grand Mound Elementary School with older students being bused to DeWitt.

Grand Mound Elementary was on a property of about 4 acres (1.6 ha) (35 rods, 10 feet by 18 rods). The first school building was built in 1917. Another school building, from 1954, had a cafeteria, a gymnasium, and two classrooms. In 1995 the district closed the original building because it was deemed to be structurally unsafe and its roof was in a poor condition. Circa 1999 that building was demolished. After the demolition the cafeteria began serving as an office, a school nurse area, and a reading and speech therapy instruction area. By 2001 Grand Mound Elementary served Kindergarten and the first grade. Grand Mound Elementary had 38 students in the 1998–1999 school year, and by 2001 the enrollment was down to 35. Grand Mound students used the library, media and computer facilities at Welton Elementary.

Circa 2001 there was a bond proposal to expand the elementary schools in DeWitt, which would have centralized services and facilities for the handicapped, and close the schools in Grand Mound and Welton. By 2002 the school closed, and was sold to God's Family Baptist Church. After the closure of Grand Mound (due to declining enrollment and concerns about the building's structural condition), students were bused to elementary schools in Welton and DeWitt; today (with Welton also closed), all elementary-aged students attend school in DeWitt.

Prior to the formation of the Central Clinton School District, Grand Mound had its own junior-senior high school, which operated in the same school building as the elementary school. Sports teams were known as the Cardinals. The last graduating senior class was in 1961, when Grand Mound—along with the Welton and DeWitt school districts—consolidated to form the Central Community School District.

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