Gillette Population

1900–2026

34,144

2026 projection

2.2% since 2020 (increase)

05K10K15K20K25K30K35K1900192019401960198020002020

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 Gillette. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202634,144+1200.35%
202534,024+490.14%
202433,975+3861.15%
202333,589+2890.87%
202233,300+2810.85%
202133,019-3841.15%
202033,403+2000.60%
201933,203+1180.36%
201833,085-170.05%
201733,102-1,5884.58%

Showing 10 of 28 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

Gillette is growing slower than Campbell County, Wyoming, and the U.S.

  • United States+3.1%
  • Campbell County+2.1%
  • Wyoming+1.9%
  • Gillette+1.6%

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.

Gillette Demographics

34.2median age

Median age

Female35.2 yrs
Male33.1 yrs

Adults

23,649
4,058 seniors (65+) · 17% of adults19,591 other adults

Sex

Female 48.2% · 16,122Male 51.8% · 17,309

Population by age

MaleFemale85+ years, male: 5385+ years, female: 19580–84 years, male: 14680–84 years, female: 21475–79 years, male: 27375–79 years, female: 34970–74 years, male: 74070–74 years, female: 28965–69 years, male: 72065–69 years, female: 1,07960–64 years, male: 1,24560–64 years, female: 75555–59 years, male: 85155–59 years, female: 99750–54 years, male: 84250–54 years, female: 95345–49 years, male: 51845–49 years, female: 67840–44 years, male: 1,23040–44 years, female: 94835–39 years, male: 1,62535–39 years, female: 1,64030–34 years, male: 1,33830–34 years, female: 1,30825–29 years, male: 1,01125–29 years, female: 1,11120–24 years, male: 1,19220–24 years, female: 80915–19 years, male: 1,22615–19 years, female: 1,05010–14 years, male: 1,45110–14 years, female: 1,4945–9 years, male: 1,5375–9 years, female: 1,2240–4 years, male: 1,3110–4 years, female: 1,02985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

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 334 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

Gillette Income

$81,316median household income

Median household income

$81,316

Half of households earn more, half earn less

Median earnings

$52,071

Typical yearly pay for a worker 25 or older.

Poverty rate

9.8%

About 1 in 10 residents

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

Gillette Marital Status

56% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married56%55%56%
Never married29%33%23%
Divorced10%8%13%
Widowed4%1%8%
Separated1%2%<1%

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

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources