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Waterloo, IL
Full City Profile · Illinois · Monroe County County
3.7
/5.0
B+
Good
11,055
Population
1,334/sq mi density
$92,005
Median Income
$44,435 per capita
$237,900
Home Value
$321,639 Zillow
$873
Median Rent
27.7% income on rent
56°F
Avg Temperature
293 sunny days/yr
89
Violent Crime/100K
993 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$92,005 median income, 2.2% unemployment
A+
Affordability
5.0 / 5.0
$237,900 home value, $873/mo rent
F
Safety
1.0 / 5.0
89 violent crimes/100K
B+
Education
3.9 / 5.0
36.4% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
+10.9%
10,102 → 11,202
over 10 years
Annual Pop. Growth
+1.04%
Compound annual growth rate
Median Income Change
+32.1%
$69,667 → $92,005
nominal, not inflation-adjusted
Annual Income Growth
+2.82%
Compound annual growth rate
Population Over Time
Total population for Waterloo across each available Census ACS release.
Median Household Income Over Time
Median household income reported by U.S. Census ACS. Values are nominal (not adjusted for inflation).
Projected 2030
Simple projections extrapolating the 2013–2023 compound annual growth rate forward. These are mathematical extensions of recent trends, not forecasts — real outcomes depend on migration, policy and economic shifts.
Projected Population 2030
12,043
+841 from 2023 (11,202)
Projected Median Income 2030
$111,778
+$19,773 from 2023 ($92,005)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 10,102 | — | $69,667 | — |
| 2015 | 10,163 | +0.6% | $73,765 | +5.9% |
| 2017 | 10,364 | +2% | $65,445 | -11.3% |
| 2019 | 10,565 | +1.9% | $67,682 | +3.4% |
| 2021 | 11,062 | +4.7% | $79,107 | +16.9% |
| 2023 | 11,202 | +1.3% | $92,005 | +16.3% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.