ZIP Codes of Montgomery County, IN

Population & People
Population & People
Total Population
38,942
Household Income
Household Income
Median Income
$80,234
Housing
Housing
Total Housing Units
16,799
Business & Economy
Business & Economy
Total Businesses
887
Employment
Employment
Employment Rate
61.79%
Education
Education
Bachelor's Degree+
20.60%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 11 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:11 ZIP Codes (9 Standard, 2 PO Box, 0 Unique) [See All]
Area Code:765
Timezone:Eastern (GMT -05:00)
Local Time:2:12:08 PM
Population:38,942 [See All]
FIPS:18107
CBSA:Crawfordsville, IN
Land Area:544 sq mi
Water Area:1 sq mi
Coordinates:40.0453, -86.9235
Quick Link:
https://www.zip-codes.com/county/in-montgomery.asp
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Indiana's #41 most populous county
38,942 residents across 11 ZIPs — #41 of 92 Indiana counties.

Standout ZIPs in this County


Most Populous
Crawfordsville · 28,357 people
72.8% of county total
Highest Income
Waveland · $104,048 median
1.3× county average
Largest Land Area
Crawfordsville · 239.9 sq mi
Spans the most ground
Fastest Growth
Crawfordsville · 1.5% (10-yr)
27,929 → 28,357 residents
Most Educated
Ladoga · 26.2% bachelor's+
400 of 1,528 adults 25+

Things worth knowing about Montgomery County


38,942 residents live across 11 ZIPs covering 544 sq mi, served by 11 distinct USPS-recognized cities.

Population moved from 38,571 to 38,942 from 2014 to 2024 — a +1.0% change. 4 ZIPs gained residents, 7 lost.

The county's wealthiest ZIP 47989 (Waveland, $104,048 median) and poorest ZIP 47990 (Waynetown, $63,198) are 12.0 miles apart — a 1.6× income gap across local geography.

Median home values vary 1.8× across this county — from $119,600 in 47990 (Waynetown) to $213,400 in 47968 (New Ross).

Density varies 90× across the county — from 22 people/sq mi in 47994 (Wingate) to 1,972 in 47965 (New Market).

Educational attainment ranges from 12.3% bachelor's+ in 47965 (New Market) to 26.2% in 47954 (Ladoga) — the breadth of educational profiles across the area.

Within Indiana, this is the #41 most populous of 92 counties and ranks #18 for median household income .

Weighted by population, the typical household earns about $71,579 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.6% of adults age 25+ hold a bachelor's degree or higher (5,445 of 26,434 reporting).

9 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Montgomery 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
544
square miles
Avg density
71.5
people per sq mi
Population
38,942
across 11 ZIPs
Crawfordsville
239.9 sq mi
28,357 residents
Ladoga
63.0 sq mi
2,224 residents
Waynetown
45.7 sq mi
1,374 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Crawfordsville

All ZIP Codes in Montgomery County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
47933CrawfordsvilleStandard28,357$68,130239.91.5%
47954LadogaStandard2,224$81,36463.0-10.9%
47940DarlingtonStandard1,421$70,71138.71.3%
47990WaynetownStandard1,374$63,19845.7-18.3%
47968New RossStandard1,356$83,24226.4107.0%
47989WavelandStandard1,274$104,04841.6-10.0%
47967New RichmondStandard873$81,56334.0-2.6%
47955LindenStandard854$71,59123.9-21.4%
47994WingateStandard674$101,89130.9117.4%
47965New MarketPO Box490$76,6070.2-23.4%
47916AlamoPO Box450.1-23.7%

Adjacent & Nearby Counties