Oregon›Malheur County

AnnexOR

A town of 340.

Population

340

Census survey, 2020–24

Is Annex a good place to live?

Annex’s July high is 94°F, above both the Oregon town median (82°F) and the median of U.S. towns (85°F). Only 2 of the 143 Oregon towns we compare have a lower median age than Annex. Annex has fewer than 1,000 residents, too few for fair grades; the figures below are still real.

Small town

340 people, and everyone knows the way

In a town this size, neighbors are the best guide. Ask them anything.

Nearby towns

Weiser · 2 mi Payette · 11 mi Ontario · 14 mi Fruitland · 15 mi Huntington · 16 mi Midvale · 20 mi

Getting set up

Moving to Annex: who provides what

Annex is unincorporated, so Malheur County and regional agencies provide most services.

PowerIdaho Power11.9¢/kWh · EIA 2025HIFLD · EIA

Internet6 providers100% of addresses get 100/20 MbpsFCC

Trash & county servicesMalheur CountyMalheur County provides services here

SchoolsAnnex School District 29Which school depends on your addressNCES

Register to voteOnlineIn Oregon you can register online until 21 days before Election Day, in person until 21 days before Election Day, or by mail (postmarked 21 days before).vote.gov

Who runs elections hereMalheur County Clerk, Elections OfficeMalheur County; contacts on the Handbook page.FVAP, Jun 2023

ZIP code9791497914 100%Census 2020

EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Oct 2, 2026.

The data

Ordered by what stands out in Annex.

Schools

The schools Annex’s kids attend

Its public schools are run by Annex SD 29. Its one school is below.

School	Level	Students	Letter
Annex Charter SchoolLargest public high schoolGrades K–12	Grades K–12	131	–

Full pageAnnex’s schools pageOpen the page

The districtsAnnex SD 29 Every school1 school · Annex Charter School Questions“Are Annex’s schools good?”

NCES · EDFacts

Natural hazards

Annex faces a high natural-hazard risk, led by inland flooding

Expected storm and flood damage is higher than in 75% of U.S. communities.

75risk score of 100

FEMA risk score

Inland floodingWildfire

Full pageAnnex’s hazards pageOpen the page

What it facesHigh risk Flood claims0 paid flood claims · No paid flood claims on record Past disasters5 disaster declarations · Declared for the county Get ready0.8 events a year, on average · Ready for inland flooding

FEMA National Risk Index · OpenFEMA

Climate

Annex has four seasons and hot summers

Annex has chilly winters and hot summers, with very little rain. Annex’s January low is 23°F, below Oregon’s towns (36°F) and close to U.S. towns (22°F).

15″snow a winter

Typical low → high °F

Winter24–40°

Spring39–65°

Summer57–90°

Fall38–65°

Oct 13

typical first frost

Apr 23

typical last frost

+1.4°

vs. the 20th-century average

Full pageAnnex’s climate pageOpen the page

A year of weatherJuly highs 94°, January lows 23°Rain & snow15″ of snow a winter · 12 inches of rain and snow a year Heating & coolingMostly a heating bill Then and now+1.4° vs. the 20th century · Warmer than the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Health

How healthy Annex is

Annex beats the Oregon average on 0 of 26 CDC measures and trails it on 13. 18% of adults report frequent physical distress in Annex. Among 143 Oregon towns, just 7 have a higher share of adults who smoke cigarettes than Annex.

	Annex	Oregon towns	U.S. towns
Frequent physical distress (CDC PLACES)	18%	15%	14%
Diabetes (CDC PLACES)	16%	11%	12%
High blood pressure (CDC PLACES)	41%	33%	35%
Fair or poor health (CDC PLACES)	26%	20%	19%