Waterloo is a city located in Lauderdale County Alabama. With a 2020 population of 197, it is the 410th largest city in Alabama and the 16744th largest city in the United States . Waterloo is currently declining at a rate of 0.00% annually and its population has decreased by -2.96% since the most recent census, which recorded a population of 203 in 2010. Waterloo reached it's highest population of 203 in 2010. Spanning over 1 miles, Waterloo has a population density of 264 people per square mile.
The average household income in Waterloo is $53,103 with a poverty rate of 9.29%. The median rental costs in recent years comes to $650 per month, and the median house value is $57,500. The median age in Waterloo is 53 years, 57.8 years for males, and 50.5 years for females.