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County ZIP codes · Missouri · FIPS 29063

DeKalb County, MO ZIP Codes

DeKalb County, Missouri has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in DeKalb County and 4 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $52,083 in 64670 (Pattonsburg) to $88,750 in 64490 (Stewartsville) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of DeKalb County?

64422 · Amity: $69k64429 · Cameron: $69k64430 · Clarksdale: $76k64463 · King City: $59k64469 · Maysville: $62k64474 · Osborn: $77k64490 · Stewartsville: $89k64494 · Union Star: $66k64497 · Weatherby: $69k64670 · Pattonsburg: $52k6442964670644636446964490644946447464422644306449764422 · Amity: $69k64429 · Cameron: $69k64430 · Clarksdale: $76k64463 · King City: $59k64469 · Maysville: $62k64474 · Osborn: $77k64490 · Stewartsville: $89k64494 · Union Star: $66k64497 · Weatherby: $69k64670 · Pattonsburg: $52k6442964670644636446964490644946447464422644306449764422 · Amity: $69k64429 · Cameron: $69k64430 · Clarksdale: $76k64463 · King City: $59k64469 · Maysville: $62k64474 · Osborn: $77k64490 · Stewartsville: $89k64494 · Union Star: $66k64497 · Weatherby: $69k64670 · Pattonsburg: $52k64429646706446364469644906449464474644226443064497
The residential ZIP codes of DeKalb County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $59,219 and $68,708.

They carry 10 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 10 residential ZIP codes in DeKalb County

6 ZIP codes lie mainly in DeKalb County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in DeKalb County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
64429 Cameron 11,449 76 $69k $207k 33%
64469 Maysville 2,225 18 $62k $154k 98%
64474 Osborn 831 15 $77k $138k 57%
64430 Clarksdale 823 19 $76k $202k 85%
64497 Weatherby 488 12 $69k $196k 66%
64422 Amity 350 8 $69k $182k 100%

Partly in DeKalb County

Residential ZIP codes mainly in another county that reach at least 1% into DeKalb County, by their share here
In this county
64494 Union Star 1,163 21 $66k $144k 47%
64490 Stewartsville 1,939 22 $89k $182k 40%
64463 King City 1,349 10 $59k $161k 26%
64670 Pattonsburg 1,007 8 $52k $177k 12%

Download the 10 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

9 ZIP codes of DeKalb County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in DeKalb County and in the neighboring counties
ZIPIn DeKalbElsewhere
6442933%Caldwell County 31%; Clinton County 31%; Daviess County 6%
6446998%Gentry County 2%
6449040%Clinton County 60%
6446326%Gentry County 66%; Andrew County 8%
6449447%Andrew County 53%
6467012%Daviess County 78%; Gentry County 5%; Harrison County 5%
6447457%Clinton County 43%
6443085%Andrew County 16%
6449766%Daviess County 34%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do DeKalb County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. DeKalb County's ZIP codes use 2 prefixes: 644 and 646.

Three-digit prefixes of DeKalb County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are DeKalb County's
PrefixSectional centerHereAll codes
644 Kansas City, MO (SCF 640) 9 70
646 Kansas City, MO (SCF 640) 1 55

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.