Fitchburg Population

1790–2026

42,259

2026 projection

0.7% since 2020 (increase)

010K20K30K40K50K18001850190019502000

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 Fitchburg. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202642,259+1230.29%
202542,136-150.04%
202442,151+2650.63%
202341,886+1950.47%
202241,691+330.08%
202141,658-2880.69%
202041,946+210.05%
201941,925-910.22%
201842,016+1280.31%
201741,888+2310.55%

Showing 10 of 39 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.

Fitchburg Demographics

36.3median age

Median age

Female35.3 yrs
Male37.5 yrs

Adults

33,190
5,985 seniors (65+) · 18% of adults27,205 other adults

Sex

Female 54.2% · 22,661Male 45.8% · 19,137

Population by age

MaleFemale85+ years, male: 18885+ years, female: 55780–84 years, male: 26380–84 years, female: 34375–79 years, male: 26875–79 years, female: 71270–74 years, male: 73770–74 years, female: 81965–69 years, male: 1,09065–69 years, female: 1,00860–64 years, male: 1,41860–64 years, female: 1,40355–59 years, male: 87955–59 years, female: 1,50250–54 years, male: 1,41650–54 years, female: 1,43945–49 years, male: 1,35945–49 years, female: 1,07240–44 years, male: 1,16740–44 years, female: 1,08735–39 years, male: 1,34535–39 years, female: 1,47230–34 years, male: 1,58230–34 years, female: 1,92425–29 years, male: 1,54225–29 years, female: 1,30120–24 years, male: 1,22720–24 years, female: 2,12615–19 years, male: 1,63715–19 years, female: 1,88410–14 years, male: 89510–14 years, female: 1,0185–9 years, male: 1,2725–9 years, female: 1,2130–4 years, male: 8520–4 years, female: 1,78185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

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 418 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

Fitchburg Income

$73,040median household income

Median household income

$73,040

Half of households earn more, half earn less

Median earnings

$52,303

Typical yearly pay for a worker 25 or older.

Poverty rate

15.6%

About 1 in 6 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Fitchburg Marital Status

34% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married34%37%32%
Never married44%46%42%
Divorced15%14%15%
Widowed5%1%8%
Separated3%2%4%

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

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources