In 2023, Waterloo, SC had a population of 192 people with a median age of 49.4 and a median household income of $41,250. Between 2022 and 2023 the population of Waterloo, SC declined from 244 to 192, a −21.3% decrease and its median household income grew from $40,500 to $41,250, a 1.85% increase.
The 5 largest ethnic groups in Waterloo, SC are Black or African American (Non-Hispanic) (81.3%), White (Non-Hispanic) (13.5%), Asian (Non-Hispanic) (2.6%), Two Races Excluding Other, & Three or More Races (Non-Hispanic) (2.6%), and American Indian & Alaska Native (Non-Hispanic) (0%).
None of the households in Waterloo, SC reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Waterloo, SC are U.S. citizens.
Most people in Waterloo, SC drove alone to work, and the average commute time was 40.4 minutes. The average car ownership in Waterloo, SC was 3 cars per household.