Waterloo is a town in Grant and Smithfield townships, DeKalb County, Indiana, United States.

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

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

Waterloo lies in the Dekalb County Central United School District.

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.

[12] 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.

WINT-TV, Channel 15, which became WANE-TV, Fort Wayne, in 1956, began broadcasting from studios in Waterloo in 1954.