Waterloo Population

2010–2026

160

2026 projection

7.4% since 2020 (increase)

050100150200201020122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Waterloo. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026160+10.63%
2025159+53.25%
2024154+21.32%
2023152+10.66%
2022151+10.67%
2021150+10.67%
2020149-31.97%
2019152+10.66%
2018151-42.58%
2017155-31.90%

Showing 10 of 17 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Waterloo is growing faster than Laurens County and the U.S., and slower than South Carolina.

  • South Carolina+8.5%
  • Waterloo+6.7%
  • Laurens County+6.2%
  • United States+3.1%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Waterloo Demographics

49median age

Median age

Female49.4 yrs
Male40.5 yrs

Adults

158
57 seniors (65+) · 36% of adults101 other adults

Sex

Female 41% · 87Male 59% · 125

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 2 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Waterloo Marital Status

32% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married32%38%25%
Never married41%30%53%
Divorced9%13%5%
Widowed6%0%13%
Separated12%19%4%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201