Census-designated place · Oregon
Annex, Oregon
Annex, census-designated place, in Malheur County, Oregon. Annex had 225 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 340 (±131). GEOID 4102200.
Residents, 2020 Census
225
Census count or controlled total
ACS 2020-2024 estimate: 340 ±131
Median household income
$67,000
±$22,735 (90% margin)
Oregon: $83,011
Median home value
$225,000
±$67,315 (90% margin)
Oregon: $477,600
Median gross rent
$894
±$877 (90% margin)
Oregon: $1,525
Where is Annex and what county is it in?
Annex is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Malheur County, Oregon. It covers 2.5 square miles of land, 92 residents per square mile in 2020.
Annex is in the Ontario, OR-ID micropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Annex, and is it growing?
The 2020 Census counted 225 residents in Annex, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 340 (±131).
The Census Bureau publishes yearly population estimates for incorporated places only; Annex is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Annex | Malheur County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 340 ±131 | 31,954 | no clear change |
| Households | 92 ±27 | 10,292 | no clear change |
| Average household size | 3.70 ±0.98 | 2.74 | no clear change |
| Housing units | 100 ±29 | 11,716 | no clear change |
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 Annex?
The median resident of Annex is 27.8 years old; 21.2% are under 18 and 8.2% are 65 or older. The largest group is non-Hispanic white residents at 58.2%, then Hispanic or Latino residents (of any race) at 35.6%.
| Measure | Annex | Malheur County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 27.8 ±10.1 | 36.1 | no clear change |
| Under 18 years | 21.2% ±9.0 pts | 25.3% | – |
| 65 years and over | 8.2% ±4.7 pts | 17.1% | – |
| Male | 51.8% ±7.4 pts | 54.9% | – |
| Hispanic or Latino (any race) | 35.6% ±17.1 pts | 34.0% | – |
| White alone, not Hispanic | 58.2% ±17.9 pts | 60.2% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±11.1 pts | 1.0% | – |
| Asian alone, not Hispanic | 0.0% ±11.1 pts | 1.2% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±11.1 pts | 0.6% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±11.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 6.2% ±5.4 pts | 2.8% | – |
| Some other race alone, not Hispanic | 0.0% ±11.1 pts | 0.1% | – |
| Born outside the United States | 7.6% ±6.1 pts | 7.4% | – |
| Speak a language other than English at home (age 5+) | 27.0% ±15.3 pts | 21.1% | – |
| Civilian veterans (age 18+) | 2.6% ±2.8 pts | 8.2% | – |
| With a disability | 25.9% ±6.5 pts | 15.9% | – |
| No health insurance coverage | 18.5% ±12.4 pts | 9.0% | – |
| High school graduate or higher (age 25+) | 82.7% ±9.5 pts | 83.7% | – |
| Bachelor's degree or higher (age 25+) | 8.9% ±6.9 pts | 15.2% | – |
| Graduate or professional degree (age 25+) | 4.7% ±6.0 pts | 4.5% | – |
| Lived in the same house a year earlier | 83.8% ±13.1 pts | 87.5% | – |
| Moved from another state in the past year | 0.9% ±1.2 pts | 5.5% | – |
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 Annex earn?
Half of Annex's 92 households earn less than $67,000 a year (±$22,735), against $54,519 in Malheur County and $83,011 in Oregon. In 2015-2019 it was $50,546 in 2024 dollars; the margins of error cannot tell the two periods apart. 12.6% of residents live below the poverty line.
| Measure | Annex | Malheur County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $67,000 ±$22,735 | $54,519 | no clear change |
| Mean household income | $85,221 ±$27,037 | $72,398 | – |
| Per capita income | $26,077 ±$5,622 | $25,000 | no clear change |
| People below the poverty line | 12.6% ±8.0 pts | 17.6% | no clear change |
| Children under 18 below the poverty line | 8.3% ±12.2 pts | 20.8% | – |
| Households receiving SNAP | 35.9% ±15.4 pts | 28.3% | – |
| Households with a computer | 95.7% ±4.9 pts | 91.7% | – |
| Households with a broadband subscription | 92.4% ±8.5 pts | 87.6% | – |
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 Annex?
Owners occupy 75.0% of Annex's occupied homes and renters 25.0%. The median owner-occupied home is valued at $225,000 by its owner (±$67,315).
| Measure | Annex | Malheur County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $225,000 ±$67,315 | $248,900 | +$73,994 |
| Median gross rent | $894 ±$877 | $821 | – |
| Renters paying 35% or more of income on rent | 47.4% ±39.9 pts | 32.2% | – |
| Median monthly owner costs, with a mortgage | $996 ±$419 | $1,478 | – |
| Owner-occupied homes | 75.0% ±14.9 pts | 63.2% | no clear change |
| Renter-occupied homes | 25.0% ±14.9 pts | 36.8% | – |
| Housing units | 100 ±29 | 11,716 | no clear change |
| Homeowner vacancy rate | 0.0% ±38.8 pts | 2.0% | – |
| Rental vacancy rate | 0.0% ±68.6 pts | 1.5% | – |
| Single-family detached homes | 81.0% ±10.3 pts | 65.1% | – |
| Mobile homes | 17.0% ±10.2 pts | 14.8% | – |
| Built 2020 or later | 7.0% ±7.9 pts | 0.9% | – |
| Built 2010 to 2019 | 2.0% ±2.9 pts | 3.3% | – |
| Built 1939 or earlier | 9.0% ±7.6 pts | 11.5% | – |
| Households with no vehicle | 2.2% ±4.0 pts | 6.7% | – |
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 do people in Annex work and get to work?
69.6% of Annex's workers drive alone. The average trip to work takes 28.8 minutes.
| Measure | Annex | Malheur County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 61.4% ±9.3 pts | 50.4% | – |
| Unemployment rate | 8.3% ±7.0 pts | 5.2% | – |
| Drove alone to work | 69.6% ±12.4 pts | 76.0% | – |
| Carpooled | 20.9% ±12.8 pts | 10.1% | – |
| Public transportation | 0.0% ±22.1 pts | 0.2% | – |
| Walked | 1.9% ±2.5 pts | 4.4% | – |
| Worked from home | 5.7% ±5.7 pts | 7.7% | – |
| Mean travel time to work | 28.8 min ±12.2 | 19.0 min | no clear change |
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 Annex?
No census tract lies mostly in Annex; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9709Malheur County | 6,204 | $63,664 |
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 Annex) · Census block assignment files
How does Annex compare with other places in Oregon?
Annex 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.
Annex's figures with every place in Oregon (CSV)
Every place in Oregon, sortable · Compare Annex 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 Annex?
25 of the 57 figures for Annex 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 Annex 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' school search.