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/SD/YOUNGEST

ZIP Codes With the Youngest Population in South Dakota

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 57470 Rockham Hand 13.6
2 57634 Keldron Corson 14.3
3 57233 Erwin Kingsbury 15.4
4 57421 Amherst Marshall 16.6
5 57652 Ridgeview Dewey 18.1
6 57566 Parmelee Todd 18.2
7 57639 Little Eagle Corson 18.7
8 57563 Okreek Todd 18.9
9 57007 Brookings Brookings 19.3
10 57197 Sioux Falls Minnehaha 19.6
11 57621 Bullhead Corson 19.7
12 57227 Corona Roberts 19.8
13 57799 Spearfish Lawrence 19.8
14 57432 Claremont Brown 19.9
15 57758 Mud Butte Meade 20.6
16 57339 Fort Thompson Buffalo 21.3
17 57420 Akaska Walworth 21.6
18 57706 Ellsworth Afb Meade 21.7
19 57714 Allen Bennett 21.7
20 57794 Wounded Knee Oglala Lakota 22.1
21 57756 Manderson Oglala Lakota 22.7
22 57750 Interior Jackson 23.6
23 57265 Strandburg Grant 23.7
24 57069 Vermillion Clay 23.9
25 57548 Lower Brule Lyman 24.0
26 57752 Kyle Oglala Lakota 24.0
27 57213 Astoria Deuel 24.6
28 57278 Willow Lake Clark 24.6
29 57572 Saint Francis Todd 24.7
30 57061 Sinai Brookings 24.9
31 57257 Peever Roberts 25.3
32 57354 Kaylor Hutchinson 25.6
33 57057 Rutland Lake 25.7
34 57361 Marty Charles Mix 25.8
35 57570 Rosebud Todd 25.8
36 57658 Wakpala Corson 26.4
37 57221 Bryant Hamlin 26.8
38 57541 Ideal Tripp 27.4
39 57248 Lake Norden Hamlin 27.5
40 57625 Eagle Butte Dewey 27.7
41 57577 Wanblee Jackson 27.8
42 57424 Ashton Spink 28.0
43 57642 Mc Laughlin Corson 28.1
44 57656 Timber Lake Dewey 28.1
45 57576 Vivian Lyman 28.3
46 57748 Howes Meade 28.4
47 57251 Marvin Grant 28.5
48 57772 Porcupine Oglala Lakota 28.5
49 57006 Brookings Brookings 28.7
50 57272 Wallace Codington 28.7

Showing the top 50 of 369 ZIP codes in South Dakota that have this figure . 57470 ranks 1st at 13.6, against 28.7 in 50th place.

Other rankings for South Dakota

Cite this page

zipcodes.pro. “ZIP Codes With the Youngest Population in South Dakota.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/sd/youngest

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