Waterbury’s population growth outpaces county and state:

| Year | Waterbury | Washington County | Vermont |
|---|---|---|---|
| 2000 | 4,915 | 58,039 | 608,827 |
| 2010 | 5,064 (3.0% growth) | 59,534 (2.5% growth) | 625,741 (2.7% growth) |
| 2020 | 5,331 (5.2% growth) | 59,807 (0.4% growth) | 633,077 (1.2% growth) |
Median household income in Waterbury is significantly higher than in Washington County or Vermont, increasing by 40% from 2010 to 2020, compared to 17% and 22% increases for the county and state, respectively.
Waterbury has added new housing units at a rate that outpaces both Washington County and Vermont:

| Year | Waterbury | Washington County | Vermont |
|---|---|---|---|
| 1980 | 1,658 | 22,113 | 223,198 |
| 1990 | 1,956 | 25,328 | 271,214 |
| 2000 | 2,106 | 27,644 | 294,382 |
| 2010 | 2,385 | 29,941 | 322,539 |
| 2020 | 2,559 | 30,645 | 334,318 |