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/MT/OLDEST

ZIP Codes With the Oldest Population in Montana

What this measures. Median age of residents, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 59461 Lothair Liberty 83.6
2 59636 Fort Harrison Lewis and Clark 76.3
3 59343 Olive Powder River 75.1
4 59316 Boyes Powder River 74.2
5 59856 Paradise Sanders 72.5
6 59240 Glentana Valley 72.0
7 59827 Conner Ravalli 71.6
8 59223 Fort Peck McCone 70.7
9 59065 Pray Park 69.9
10 59747 Pony Madison 69.8
11 59532 Kremlin Hill 68.7
12 59720 Cameron Madison 68.2
13 59755 Virginia City Madison 67.7
14 59463 Monarch Cascade 67.6
15 59319 Capitol Carter 67.3
16 59746 Polaris Beaverhead 66.4
17 59345 Powderville Custer 66.1
18 59871 Sula Ravalli 66.1
19 59314 Biddle Powder River 65.8
20 59545 Whitlash Liberty 65.4
21 59854 Ovando Powell 65.3
22 59071 Roscoe Carbon 64.9
23 59419 Bynum Teton 64.8
24 59061 Nye Stillwater 64.7
25 59333 Hathaway Rosebud 64.5
26 59410 Augusta Lewis and Clark 64.5
27 59642 Ringling Meagher 64.4
28 59826 Condon Missoula 64.2
29 59868 Seeley Lake Missoula 63.8
30 59006 Ballantine Yellowstone 63.7
31 59483 Sun River Cascade 63.6
32 59484 Sweet Grass Toole 63.4
33 59062 Otter Powder River 63.2
34 59349 Terry Prairie 63.2
35 59242 Homestead Sheridan 62.9
36 59460 Loma Chouteau 62.8
37 59914 Dayton Lake 62.5
38 59074 Ryegate Golden Valley 62.4
39 59276 Whitetail Daniels 62.4
40 59028 Fishtail Stillwater 62.3
41 59432 Dupuyer Pondera 62.3
42 59913 Coram Flathead 62.1
43 59462 Moccasin Judith Basin 61.0
44 59762 Wise River Deer Lodge 60.8
45 59260 Richland Valley 60.7
46 59926 Martin City Flathead 60.5
47 59078 Shawmut Wheatland 60.4
48 59873 Thompson Falls Sanders 60.4
49 59332 Hammond Carter 60.3
50 59477 Simms Cascade 60.3

Showing the top 50 of 364 ZIP codes in Montana that have this figure . 59461 ranks 1st at 83.6, against 60.3 in 50th place.

Other rankings for Montana

Cite this page

zipcodes.pro. “ZIP Codes With the Oldest Population in Montana.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/mt/oldest

Underlying data is public domain or openly licensed — sources, vintages and licences.