Town · Arizona
Duncan, Arizona
Duncan, town, in Greenlee County, Arizona. Duncan had 672 residents on July 1, 2025 by the Census Bureau's estimate, down 2.7% since 2020; the 2020 Census counted 694 and the ACS 2020-2024 5-year estimates put it at 969 (±243). GEOID 0420750.
Residents, July 2025 estimate
672
Census Bureau estimate (no margin published)
2020 Census count: 694 · ACS 2020-2024: 969 ±243
Median household income
$33,529
±$13,169 (90% margin)
Arizona: $79,964
Median home value
$139,000
±$44,193 (90% margin)
Arizona: $394,500
Median gross rent
$665
±$88 (90% margin)
Arizona: $1,543
Where is Duncan and what county is it in?
Duncan is a town in Greenlee County, Arizona. It covers 2.2 square miles of land, 322 residents per square mile in 2020.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Duncan, and is it growing?
The Census Bureau estimates that 672 people lived in Duncan on July 1, 2025, down 2.7% since 2020, while Arizona grew 6.5%. The 2020 Census counted 694 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 969 (±243).
| Measure | Duncan | Greenlee County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 969 ±243 | 9,409 | no clear change |
| Households | 366 ±111 | 3,591 | no clear change |
| Average household size | 2.65 ±0.58 | 2.60 | no clear change |
| Housing units | 422 ±110 | 4,433 | no clear change |
Duncan's population since 2000
From 812 in 2000 to 672 in 2025: down 17.2%. The 2000, 2010 and 2020 figures are census counts, each for Duncan as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Duncan?
The median resident of Duncan is 37.2 years old; 26.1% are under 18 and 14.1% are 65 or older. The largest group is non-Hispanic white residents at 58.4%, then Hispanic or Latino residents (of any race) at 25.4%.
| Measure | Duncan | Greenlee County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 37.2 ±10.5 | 36.3 | no clear change |
| Under 18 years | 26.1% ±8.4 pts | 25.5% | – |
| 65 years and over | 14.1% ±6.2 pts | 14.1% | – |
| Male | 39.8% ±7.4 pts | 54.7% | – |
| Hispanic or Latino (any race) | 25.4% ±11.4 pts | 46.7% | no clear change |
| White alone, not Hispanic | 58.4% ±13.9 pts | 45.1% | −18.2 pts |
| Black or African American alone, not Hispanic | 0.0% ±4.5 pts | 1.4% | – |
| Asian alone, not Hispanic | 0.0% ±4.5 pts | 1.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 3.4% ±5.6 pts | 1.8% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±4.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 12.8% ±11.2 pts | 3.5% | – |
| Some other race alone, not Hispanic | 0.0% ±4.5 pts | 0.1% | – |
| Born outside the United States | 1.8% ±2.8 pts | 7.9% | – |
| Speak a language other than English at home (age 5+) | 9.8% ±7.0 pts | 23.5% | – |
| Civilian veterans (age 18+) | 6.1% ±4.4 pts | 8.5% | – |
| With a disability | 27.8% ±12.8 pts | 15.6% | – |
| No health insurance coverage | 9.8% ±4.9 pts | 2.9% | – |
| High school graduate or higher (age 25+) | 70.6% ±12.1 pts | 85.5% | – |
| Bachelor's degree or higher (age 25+) | 13.5% ±7.5 pts | 20.9% | no clear change |
| Graduate or professional degree (age 25+) | 4.2% ±3.3 pts | 7.4% | – |
| Lived in the same house a year earlier | 82.5% ±12.9 pts | 88.2% | – |
| Moved from another state in the past year | 0.7% ±0.8 pts | 2.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Duncan earn?
Half of Duncan's 366 households earn less than $33,529 a year (±$13,169), against $71,164 in Greenlee County and $79,964 in Arizona. In 2015-2019 the median was $56,150 in 2024 dollars, so it fell by $22,621 after inflation. 36.5% of residents live below the poverty line.
| Measure | Duncan | Greenlee County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $33,529 ±$13,169 | $71,164 | −$22,621 |
| Mean household income | $53,302 ±$11,254 | $83,384 | – |
| Per capita income | $21,174 ±$4,884 | $32,045 | −$11,949 |
| People below the poverty line | 36.5% ±19.3 pts | 8.2% | no clear change |
| Children under 18 below the poverty line | 40.2% ±26.5 pts | 6.8% | – |
| Households receiving SNAP | 26.5% ±13.6 pts | 5.7% | – |
| Households with a computer | 95.4% ±5.8 pts | 96.4% | – |
| Households with a broadband subscription | 91.5% ±7.7 pts | 90.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Duncan?
Owners occupy 50.8% of Duncan's occupied homes and renters 49.2%. The median owner-occupied home is valued at $139,000 by its owner (±$44,193). The median renter pays $665 a month including utilities, and 52.5% of renters pay 35% or more of their income on rent.
| Measure | Duncan | Greenlee County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $139,000 ±$44,193 | $158,600 | no clear change |
| Median gross rent | $665 ±$88 | $648 | no clear change |
| Renters paying 35% or more of income on rent | 52.5% ±26.2 pts | 8.5% | – |
| Median monthly owner costs, with a mortgage | $1,255 ±$145 | $1,093 | – |
| Owner-occupied homes | 50.8% ±13.4 pts | 53.0% | −27.6 pts |
| Renter-occupied homes | 49.2% ±13.4 pts | 47.0% | – |
| Housing units | 422 ±110 | 4,433 | no clear change |
| Homeowner vacancy rate | 2.5% ±4.8 pts | 0.3% | – |
| Rental vacancy rate | 0.0% ±21.9 pts | 13.0% | – |
| Single-family detached homes | 55.2% ±15.0 pts | 73.1% | – |
| Mobile homes | 14.7% ±7.6 pts | 16.7% | – |
| Built 2020 or later | 0.7% ±1.1 pts | 0.4% | – |
| Built 2010 to 2019 | 0.0% ±10.1 pts | 3.0% | – |
| Built 1939 or earlier | 12.8% ±9.5 pts | 4.3% | – |
| Households with no vehicle | 18.3% ±12.2 pts | 2.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Duncan building?
Builders took permits for 0 new housing units in Duncan in 2025 (0 in single-family houses), 0.0 per 1,000 residents against 6.8 across Arizona.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Duncan work and get to work?
77.0% of Duncan's workers drive alone. The average trip to work takes 30.3 minutes.
| Measure | Duncan | Greenlee County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 37.2% ±11.1 pts | 55.7% | – |
| Unemployment rate | 4.9% ±6.3 pts | 2.3% | – |
| Drove alone to work | 77.0% ±14.5 pts | 87.7% | – |
| Carpooled | 16.3% ±12.8 pts | 8.8% | – |
| Public transportation | 0.0% ±15.3 pts | 0.0% | – |
| Walked | 3.0% ±3.6 pts | 2.5% | – |
| Worked from home | 3.7% ±5.6 pts | 0.9% | – |
| Mean travel time to work | 30.3 min ±4.0 | 19.1 min | −18.8 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Duncan?
No census tract lies mostly in Duncan; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9603Greenlee County | 2,672 | $76,250 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Duncan) · Census block assignment files
How does Duncan compare with other places in Arizona?
By the Census Bureau's July 2025 estimates, Duncan is the 12,008th-most populous of the 19,476 U.S. incorporated places that have one and the 87th-most populous of 91 in Arizona.
Duncan is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 87th | 91 |
Duncan's figures with every place in Arizona (CSV)
Every place in Arizona, sortable · Compare Duncan with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Duncan?
23 of the 57 figures for Duncan on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Duncan are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Duncan.