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 — STATE/MO/COUNTY/DEKALB

DeKalb County, MO ZIP codes

DeKalb County, MO has 6 ZIP codes, in 6 towns: 64429, 64469, 64474, 64430, 64497 and 64422. 3 more cross into it from neighbouring counties: 64490, 64463 and 64494.

The county seat is Maysville.

ZIP codes
6
Partly in it
3 more
Towns
6
County seat
Maysville
County FIPS
29063
Population
10,876
Median household income
$69,826
Land area
421 sq mi
Area code
975
Metro area
St. Joseph

DeKalb County ZIP codes by town

Maysville (county seat)
64469

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in DeKalb County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of DeKalb County.

Map of DeKalb County ZIP codes

644226442964430644696447464497

The ZIP codes of DeKalb County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

DeKalb County in numbers

About 10,876 people live in DeKalb County, in 3,732 households, the 80th most populous of Missouri's 115 counties. The median household income is $69,826 a year, about the same as the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $169,200 (27% below the Missouri median), and median gross rent is $817 a month. The median age is 42.2; 16.4% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 31 minutes.

Population10,876DeKalb10,876
Households3,732DeKalb3,732
Median age42.2DeKalb42.2Missouri39.0US 38.9
Median household income$69,826DeKalb$69,826Missouri$70,702US $80,734
Median home value$169,200DeKalb$169,200Missouri$230,300US $332,700
Median gross rent$817DeKalb$817Missouri$1,033US $1,413
Bachelor's degree or higher16.4%DeKalb16.4%Missouri32.4%US 35.7%
Mean commute31.1 minDeKalb31.1 minMissouri23.5 minUS 26.4 min
Population density26 / sq miDeKalb26 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in DeKalb County

Largest towns in DeKalb County
TownZIP codesPopulation
Cameron 1 8,519
Maysville 1 947
Osborn 1 424
Clarksdale 1 399
Weatherby 1 75
Amity 1 72

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with DeKalb County.

Not sure you are in DeKalb County? What county am I in? answers from your location, near a county line included.

Every ZIP code in DeKalb County, with figures

ZIP codes in DeKalb County
ZIP City Type Population Median income Median home
64422 Amity , MO Standard 350 $68,882 $181,900
64429 Cameron , MO Standard 11,449 $68,708 $206,600
64430 Clarksdale , MO Standard 823 $75,577 $202,400
64469 Maysville , MO Standard 2,225 $62,059 $154,000
64474 Osborn , MO Standard 831 $77,083 $137,500
64497 Weatherby , MO Standard 488 $69,250 $196,100

Cite this page

zipcodes.pro. “DeKalb County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/dekalb

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