Waterloo was in the area of present Denison in north central Grayson County. It probably began after 1856 as a stop on the Butterfield Overland Mail route across northeastern Texas. It was on a bluff overlooking a small lake, which may have been called Waterloo Lake. Waterloo must have become part of Denison when that city was established in 1872.

Adapted from the official Handbook of Texas, a state encyclopedia developed by the Texas State Historical Association (TSHA). It is an authoritative source of trusted historical records.

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Waterloo is classified as a Town

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