The Waterloo Public Library-East Side Branch is a historic building located in Waterloo, Iowa, United States. The public library was established here in 1896. It operated out of two rented rooms, one on the east side of the Cedar River and other on the west side. The Carnegie Foundation offered a grant of $30,000 to build a new library, but disagreements erupted over whether to place the building on the east side or west side of the river