ZIP Codes of Putnam County, IN

Population & People
Population & People
Total Population
40,005
Household Income
Household Income
Median Income
$80,113
Housing
Housing
Total Housing Units
16,403
Business & Economy
Business & Economy
Total Businesses
767
Employment
Employment
Employment Rate
54.80%
Education
Education
Bachelor's Degree+
20.00%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 9 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:765
Timezone:Eastern (GMT -05:00)
Local Time:2:12:08 PM
Population:40,005 [See All]
FIPS:18133
CBSA:Greencastle, IN
Land Area:521 sq mi
Water Area:3 sq mi
Coordinates:39.6693, -86.8445
Quick Link:
https://www.zip-codes.com/county/in-putnam.asp
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Extreme geographic sprawl
The largest ZIP spans 835× the smallest by area — 167.6 sq mi down to 0.20.

Standout ZIPs in this County


Most Populous
Greencastle · 19,632 people
49.1% of county total
Highest Income
Coatesville · $89,409 median
1.1× county average
Largest Land Area
Greencastle · 167.6 sq mi
Spans the most ground
Fastest Growth
Reelsville · 42.2% (10-yr)
1,419 → 2,018 residents
Most Educated
Coatesville · 23.9% bachelor's+
882 of 3,693 adults 25+

Things worth knowing about Putnam County


40,005 residents live across 9 ZIPs covering 521 sq mi, served by 9 distinct USPS-recognized cities.

Population moved from 40,689 to 40,005 from 2014 to 2024 — a -1.7% change. 3 ZIPs gained residents, 5 lost.

The county's wealthiest ZIP 46121 (Coatesville, $89,409 median) and poorest ZIP 46120 (Cloverdale, $59,970) are 12.2 miles apart — a 1.5× income gap across local geography.

Median home values vary 1.7× across this county — from $171,400 in 46120 (Cloverdale) to $287,100 in 46171 (Reelsville).

Density varies across the county — from 21 people/sq mi in 46175 (Russellville) to 117 in 46135 (Greencastle).

Educational attainment ranges from 9.2% bachelor's+ in 46175 (Russellville) to 23.9% in 46121 (Coatesville) — the breadth of educational profiles across the area.

Within Indiana, this is the #39 most populous of 92 counties and ranks #19 for median household income .

Weighted by population, the typical household earns about $76,365 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.0% of adults age 25+ hold a bachelor's degree or higher (5,468 of 27,337 reporting).

9 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Putnam County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
521
square miles
Avg density
76.8
people per sq mi
Population
40,005
across 9 ZIPs
Greencastle
167.6 sq mi
19,632 residents
Cloverdale
94.4 sq mi
5,947 residents
Roachdale
68.2 sq mi
2,427 residents

All ZIP Codes in Putnam County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
46135GreencastleStandard19,632$73,677167.6-5.3%
46120CloverdaleStandard5,947$59,97094.4-1.0%
46121CoatesvilleStandard5,271$89,40957.2-3.1%
46128FillmoreStandard2,490$86,46630.136.9%
46172RoachdaleStandard2,427$85,91268.20.2%
46171ReelsvilleStandard2,018$83,60738.442.2%
46105BainbridgeStandard1,731$87,73641.5-22.7%
46175RussellvilleStandard489$74,12523.6-19.0%
46170PutnamvilleStandard00.2

Adjacent & Nearby Counties