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County ZIP codes · Illinois · FIPS 17125

Mason County, IL ZIP Codes

Mason County, Illinois has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Mason County and 3 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $57,689 in 62644 (Havana) to $79,551 in 61546 (Manito) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Mason County?

61532 · Forest City: $72k61546 · Manito: $80k61567 · Topeka: $69k62617 · Bath: $57k62627 · Chandlerville: $63k62633 · Easton: $45k62644 · Havana: $58k62655 · Kilbourne: $57k62664 · Mason City: $71k62671 · New Holland: $99k62682 · San Jose: $60k615466264462627626176266462633626826156762655626716153261532 · Forest City: $72k61546 · Manito: $80k61567 · Topeka: $69k62617 · Bath: $57k62627 · Chandlerville: $63k62633 · Easton: $45k62644 · Havana: $58k62655 · Kilbourne: $57k62664 · Mason City: $71k62671 · New Holland: $99k62682 · San Jose: $60k615466264462627626176266462633626826156762655626716153261532 · Forest City: $72k61546 · Manito: $80k61567 · Topeka: $69k62617 · Bath: $57k62627 · Chandlerville: $63k62633 · Easton: $45k62644 · Havana: $58k62655 · Kilbourne: $57k62664 · Mason City: $71k62671 · New Holland: $99k62682 · San Jose: $60k61546626446262762617626646263362682615676265562671
The residential ZIP codes of Mason 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 $57,689 and $70,509.

They carry 11 postal town names.

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

All 11 residential ZIP codes in Mason County

8 ZIP codes lie mainly in Mason County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Mason County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
62644 Havana 4,615 48 $58k $103k 68%
62664 Mason City 2,922 27 $71k $101k 100%
62682 San Jose 684 15 $60k $100k 56%
62633 Easton 638 10 $45k $87k 100%
62655 Kilbourne 594 10 $57k – 100%
62617 Bath 524 8 $57k $69k 100%
61567 Topeka 411 8 $69k $88k 100%
61532 Forest City 347 11 $72k $116k 100%

Partly in Mason County

Residential ZIP codes mainly in another county that reach at least 1% into Mason County, by their share here
In this county
62627 Chandlerville 1,006 12 $63k $84k 38%
61546 Manito 3,849 41 $80k $136k 37%
62671 New Holland 362 7 $99k $109k 10%

Download the 11 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?

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

Share of each ZIP code's land in Mason County and in the neighboring counties
ZIPIn MasonElsewhere
6264468%Fulton County 32%
6154637%Tazewell County 63%
6262738%Cass County 62%
6268256%Logan County 30%; Tazewell County 14%
6267110%Logan County 90%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Mason County's ZIP codes use 2 prefixes: 615 and 626.

Three-digit prefixes of Mason 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 Mason County's
PrefixSectional centerHereAll codes
615 Peoria, IL (SCF 615) 3 48
626 Springfield, IL (SCF 625) 8 62

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