Waterloo, AL has a population of 163 and is the 25,334th largest city in the United States. The population density is 218 per sq mi which is 137% higher than the Alabama average and 141% higher than the national average. The median age in Waterloo is 41 which is approximately 7% higher than the Alabama average of 39. In Waterloo, 57% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 56% of Waterloo residents were born in Alabama, 44% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Waterloo is 137% higher than Alabama.
The median age in Waterloo is 7% higher than Alabama.
In Waterloo 100.00% of the population is White.
In Waterloo 0.00% of the population is Black or African American.