Duncan Population

2010–2026

389

2026 projection

1.3% since 2020 (increase)

0100200300400201020122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual 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 Duncan. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026389+10.26%
2025388-30.77%
2024391+10.26%
2023390+51.30%
2022385+20.52%
2021383-10.26%
2020384+82.13%
2019376+10.27%
2018375+10.27%
2017374+10.27%

Showing 10 of 17 years.

Duncan Demographics

21.6median age

Median age

Female25.5 yrs
Male21.6 yrs

Adults

346
65 seniors · 19%281 other adults

Sex

Female 44.6% · 273Male 55.4% · 339

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 6 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

Duncan Income

$74,688median household income

Median household income

$74,688

Half of households earn more, half earn less

Median earnings

$45,313

Typical yearly pay for a worker 25 or older.

Poverty rate

1.4%

About 1 in 70 residents

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

Duncan Marital Status

60% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married60%56%63%
Never married32%35%30%
Divorced7%8%5%
Widowed1%<1%2%
Separated0%0%0%

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