What is the largest city in Grant County, IN?

Marion is the largest city or town in Grant County, with about 27,531 residents.

How many ZIP codes are in Grant County?

Grant County includes 11 ZIP Code Tabulation Areas, including 46928, 46930, 46933, 46938, 46952.

What is the population of Grant County, IN?

About 66,295 people live in Grant County, based on American Community Survey 5-year estimates.

What counties border Grant County?

Grant County borders Madison County, Delaware County, Howard County, Huntington County, Miami County, Wabash County, Wells County, Tipton County, Blackford County.

Grant County, IN: Cities, ZIP Codes & Local Data

Population

66,295

Land area

414sq mi

People per sq mi

160

ZIP codes

11

Grant County at a glance

Households here earn a median of $53,522 a year, 26% less than the Indiana figure of $71,957.
A typical owner-occupied home is valued at $122,300 (44% below Indiana) and median rent is $853 a month.
The biggest population centers are Marion (27,531), Gas City (6,076) and Upland (3,918).

Local data for Grant County, IN

Counts from official public data

Housing and community stats

Grant County, IN, American Community Survey 2020-2024

Full profile

Median household income

$53,522

Poverty rate

19.8%

Median home value

$122,300

Prices +6.8% in a year

Median rent

$853/mo

Homeownership

72.7%

Bachelor's or higher

20.3%

Median age

38.7

Average commute

22.0 min

Largest reported origins and ancestries: German Americans (11,543), Irish Americans (6,243), Mexican Americans (2,700).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

4.1%

Sep 2026, +0.1 pts in a year

Average annual pay

$52,159

27,713 jobs, 2025

Income per person

$51,373

BEA, 2024

Federal spending

$510M

FY 2026, $7,649 per person

PPP loans

$94M

1,477 loans, 11,724 jobs reported

Campaign donations

$72.5K

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Grant County, IN, workers 16 and older. American Community Survey 5-year estimates

Drove alone74.9%
Carpooled10.2%
Public transit0.1%
Walked5.5%
Bicycle0.4%
Taxi, ride-hailing, motorcycle or other1.1%
Worked from home7.8%

Average one-way commute: 22.0 minutes for people who do not work from home.

Environment and hazard risk

Grant County, IN, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: tornado

Storm events since 1996

391

Most often thunderstorm wind

Flood insurance policies

66

0.2% of homes, county

July high / Jan low

84° / 18°F

41.8 inches of rain a year

Hazards, floods and storm history Check a flood zone 15 historic places

Health statistics

Share of adults in Grant County, IN, CDC PLACES estimates

All 40 measures

Obesity

41.1%

U.S. 33.3% +7.8 pts

Diabetes

15.2%

U.S. 12.1% +3.1 pts

Smoking

17.8%

U.S. 12.8% +5.0 pts

Uninsured (18-64)

9.1%

U.S. 11.1% -2.0 pts

Cities, towns and ZIP codes in Grant County

Population shown

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Frequently asked questions

What is the largest city in Grant County, IN?: Marion is the largest city or town in Grant County, with about 27,531 residents.
How many ZIP codes are in Grant County?: Grant County includes 11 ZIP Code Tabulation Areas, including 46928, 46930, 46933, 46938, 46952.
What is the population of Grant County, IN?: About 66,295 people live in Grant County, based on American Community Survey 5-year estimates.
What counties border Grant County?: Grant County borders Madison County, Delaware County, Howard County, Huntington County, Miami County, Wabash County, Wells County, Tipton County, Blackford County.