Waterloo is a populated place LOCATED WITHIN the City of Edmond. In turn, the City of Edmond is located within Oklahoma County.
Waterloo is located at latitude 35.725 and longitude -97.478.
Since Waterloo is located within the City of Edmond, all of the census and demographic data for residents of Waterloo are included as part of the information reported for City of Edmond in the "Profile" tab above.