Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — RANKINGS/OR/HIGHEST-DENSITY

Most Densely Populated ZIP Codes in Oregon

What this measures. People per square mile of land area. Source: Census American Community Survey and Gazetteer, data release 2026-10-12.

# ZIP City County People per sq mi
1 97209 Portland Multnomah 21,647
2 97212 Portland Multnomah 10,276
3 97205 Portland Multnomah 9,683
4 97214 Portland Multnomah 9,534
5 97201 Portland Multnomah 8,828
6 97232 Portland Multnomah 8,350
7 97310 Salem Marion 7,835
8 97233 Portland Multnomah 7,804
9 97213 Portland Multnomah 7,790
10 97206 Portland Multnomah 7,733
11 97215 Portland Multnomah 7,407
12 97202 Portland Multnomah 6,931
13 97331 Corvallis Benton 6,776
14 97216 Portland Multnomah 6,613
15 97006 Beaverton Washington 6,422
16 97003 Beaverton Washington 5,907
17 97266 Portland Multnomah 5,847
18 97005 Beaverton Washington 5,518
19 97008 Beaverton Washington 5,400
20 97401 Eugene Lane 5,329
21 97301 Salem Marion 5,093
22 97127 Lafayette Yamhill 5,088
23 97030 Gresham Multnomah 5,033
24 97239 Portland Multnomah 4,965
25 97432 Dillard Douglas 4,952
26 97027 Gladstone Clackamas 4,921
27 97236 Portland Multnomah 4,866
28 97211 Portland Multnomah 4,732
29 97223 Portland Washington 4,567
30 97035 Lake Oswego Clackamas 4,455
31 97267 Portland Clackamas 4,332
32 97222 Portland Clackamas 4,208
33 97078 Beaverton Washington 4,077
34 97224 Portland Washington 4,042
35 97020 Donald Marion 4,018
36 97227 Portland Multnomah 3,970
37 97225 Portland Washington 3,888
38 97229 Portland Washington 3,873
39 97403 Eugene Lane 3,634
40 97219 Portland Multnomah 3,627
41 97220 Portland Multnomah 3,622
42 97204 Portland Multnomah 3,583
43 97404 Eugene Lane 3,561
44 97024 Fairview Multnomah 3,483
45 97086 Happy Valley Clackamas 3,300
46 97217 Portland Multnomah 3,154
47 97230 Portland Multnomah 3,118
48 97203 Portland Multnomah 3,073
49 97373 Saint Benedict Marion 3,022
50 97477 Springfield Lane 3,022

Showing the top 50 of 428 ZIP codes in Oregon that have this figure . 97209 ranks 1st at 21,647, against 3,022 in 50th place.

Other rankings for Oregon

Cite this page

zipcodes.pro. “Most Densely Populated ZIP Codes in Oregon.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/or/highest-density

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