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Waterloo, Indiana
Location of Waterloo in DeKalb County, Indiana.
Location of Waterloo in DeKalb County, Indiana.
Country United States
State Indiana
County DeKalb
Township Grant, Smithfield
 • Total 2.11 sq mi (5.47 km2)
 • Land 2.11 sq mi (5.47 km2)
 • Water 0.00 sq mi (0.00 km2)
906 ft (276 m)
 • Total 2,116
 • Density 1,002.84/sq mi (387.16/km2)
Time zone UTC-5 (Eastern (EST))
 • Summer (DST) UTC-4 (EDT)
ZIP code
Area code(s) 260
FIPS code 18-81278
GNIS feature ID 0445542

Waterloo is a town in Grant and Smithfield townships, DeKalb County, Indiana, United States. The population was 2,242 at the 2010 census.


Waterloo was laid out in 1856 when the railroad was extended to that point. It was likely named after Waterloo, in Belgium.

The Waterloo Community Mausoleum was added to the National Register of Historic Places in 2014.


Waterloo is located at 41°25′53″N 85°1′21″W / 41.43139°N 85.02250°W / 41.43139; -85.02250.

According to the 2010 census, Waterloo has a total area of 1.74 square miles (4.51 km2), all land.

A nearly complete mastodon skeleton discovered near Waterloo in 1888 is displayed at the Carnegie Museum of Natural History in Pittsburgh.

Waterloo, Indiana, USA
Historic houses in Waterloo


Historical population
Census Pop.
1860 343
1870 1,259 267.1%
1880 1,376 9.3%
1890 1,478 7.4%
1900 1,244 −15.8%
1910 1,167 −6.2%
1920 1,172 0.4%
1930 1,244 6.1%
1940 1,257 1.0%
1950 1,414 12.5%
1960 1,432 1.3%
1970 1,876 31.0%
1980 1,951 4.0%
1990 2,040 4.6%
2000 2,200 7.8%
2010 2,242 1.9%
2020 2,116 −5.6%
U.S. Decennial Census
Waterloo, Indiana 1876
Waterloo, Indiana from 1876 Illustrated Historical Atlas of the State of Indiana, Baskin, Forster, Co., Chicago.

2010 census

As of the census of 2010, there were 2,242 people, 809 households, and 577 families living in the town. The population density was 1,288.5 inhabitants per square mile (497.5/km2). There were 942 housing units at an average density of 541.4 per square mile (209.0/km2). The racial makeup of the town was 95.3% White, 0.5% African American, 0.1% Native American, 1.7% from other races, and 2.4% from two or more races. Hispanic or Latino of any race were 3.8% of the population.

There were 809 households, of which 42.5% had children under the age of 18 living with them, 48.1% were married couples living together, 16.8% had a female householder with no husband present, 6.4% had a male householder with no wife present, and 28.7% were non-families. 23.4% of all households were made up of individuals, and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.19.

The median age in the town was 31.5 years. 30% of residents were under the age of 18; 10.1% were between the ages of 18 and 24; 29.1% were from 25 to 44; 22.9% were from 45 to 64; and 8% were 65 years of age or older. The gender makeup of the town was 50.6% male and 49.4% female.


Waterloo lies in the Dekalb County Central United School District. Public schools serving Waterloo are:

  • Waterloo Elementary School
  • DeKalb Middle School
  • DeKalb High School

The town is served by the Waterloo-Grant Township Public Library, one of four public libraries in Dekalb County.

Rail transportation

Waterloo is located on the old Lake Shore and Michigan Southern Railway, and is now on the Norfolk Southern Railway. The town is now served daily by two Amtrak trains: the Capitol Limited and the Lake Shore Limited.

In October 2010, the Town of Waterloo received a $1.8 million grant from the federal government to build a longer platform just east of the current station, bringing it up to ADA standards, and add a canopy, lighting, and interactive signage. Ultimately, the platform was not built, but the grant was used to install the lighting and electronic signage, as well as a parking lot, in 2016. The previous rail depot, which was restored in 2010, was moved closer to the existing platform and reopened to Amtrak passengers.

See also

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