Warren County, Indiana

Warren County is a county in Indiana, United States, in the west-central part of the state,
about 24 miles west of Lafayette and directly on the Illinois state line. It had a population of
8,440 at the 2020 census, an estimated 8,474 by 2025, and covers 366.40 square miles (949.0 km2)
centred near 40°21′N 87°22′W.

Williamsport is the county seat; its postal code is 47993. The county holds 4 incorporated
towns and more than a dozen smaller unincorporated communities across 12 townships, and it runs
on Eastern Time. Warren is the least populous county in Indiana.

Towns & Villages in Warren County

Warren County has 4 incorporated towns and about 20 named unincorporated communities on
record, most of them crossroads settlements that never grew past a store, a church and a grain
elevator. CDP stands for census designated place; Unincorp. covers hamlets and crossroads with no
formal boundary or local government.

The county’s old settlement list carried several duplicate entries and left out Kramer,
site of the former Hotel Mudlavia resort. Chatterton and the county’s original seat,
Warrenton, no longer function as active communities but their names persist on local maps and
survive here for that reason.

Townships

These township counts are the most recent published figures, from the 2010 census; Indiana’s
county subdivisions were not separately re-tabulated in the 2020 count the way incorporated places
were.

ZIP Codes

• 47993 — Williamsport
• 47991 — West Lebanon
• 47975 — Pine Village
• 47982 — State Line (post office box ZIP)

Every unincorporated community in the county, including Independence, Marshfield, Johnsonville
and Kramer, gets its mail under one of these four ZIP codes rather than a code of its own.

Geography

Warren County lies between the Illinois state line and the Wabash River, which forms its
southeastern border. The northwest half is flat prairie farmland; the southeast, along the
Wabash, turns hilly and wooded. Williamsport Falls, a 90-foot drop near the middle of town, is
the tallest free-falling waterfall in Indiana. Of the county’s 366.40 square miles, 364.68
are land and 1.72 are water, about 0.5 percent, reflecting the lack of any large lake or
reservoir.

Benton County lies to the north, Tippecanoe County to the east, Fountain County and Vermillion
County to the south, and Vermilion County, Illinois, directly across the state line to the west.
Tippecanoe County, Fountain County, Vermillion County and Vermilion County, Illinois each border
Warren directly; Benton County has no live profile on this site to link to.

Demographics

Warren County had a population of 8,440 at the 2020 census, and the latest estimate puts it
near 8,474 residents — making it Indiana’s least populous county. Williamsport and
West Lebanon are the two largest communities, together holding roughly a third of the county’s
population, with the rest scattered across rural townships. Median household income runs about
$82,425, above Indiana’s statewide 2023 ACS figure of $69,477. The county is entirely rural
by Census classification, and population density works out to about 23 people per square mile of
land, among the lowest in the state.

Economy & Local Life

Manufacturing employs the most workers in the county, about 1,032 people, followed by retail
trade at 591 and health care and social assistance at 514. Agriculture, mostly corn and soybeans
on the county’s prairie ground, and government employment each account for a meaningful
share of local jobs as well. Flex-N-Gate operates a manufacturing facility in the county, and
grain elevators run by Archer Daniels Midland and the Westland Co-Op anchor the agricultural
economy at State Line City. The Review Republican, based in Williamsport, is the county’s
only newspaper. Warren County has no local radio or television station of its own; residents pick
up broadcasts out of Indianapolis, Lafayette and Champaign-Urbana.

History

Indiana’s legislature formed Warren County on 1 March 1827, the state’s 55th
county, carving it from unorganized territory along the Wabash. It was named for Joseph Warren,
the physician and militia general killed at the Battle of Bunker Hill in 1775. Williamsport,
platted by and named for William Harrison in 1828, became the county seat in June 1829, replacing
the short-lived original seat of Warrenton.

The Potawatomi Trail of Death, the forced 1838 removal of the Potawatomi from northern Indiana
to Kansas, passed through the county that September; two children who died along the way are
buried locally. On 17 April 1922, a tornado destroyed much of Hedrick. Abraham Lincoln passed
through State Line on 11 February 1861, on his way from Springfield, Illinois, to his inauguration
in Washington, D.C., and a marker there preserves his remarks. On 19 September 1964, the Wabash
Cannonball passenger train derailed at a Johnsonville crossing, causing more than $500,000 in
damage.

Getting There

No interstate highway crosses Warren County. US 41 and US 136 are the main federal routes, with
State Roads 26, 28, 55, 63, 263 and 352 covering the rest. Norfolk Southern freight trains, along
with the Bee Line and Vermilion Valley short lines, cross the county but carry no passengers.

• Lafayette, Indiana — about 24 miles east
• Danville, Illinois — about 21 miles west
• Covington, Indiana — about 11 miles south
• Attica, Indiana — about 3 miles south

Indianapolis International Airport, roughly 90 miles southeast of Williamsport, is the nearest
major commercial airport. The nearest Amtrak station is in Crawfordsville, about 28 miles
southeast, where the Cardinal stops on its run between Chicago, Indianapolis and New York.

Frequently Asked Questions

Where is Warren County located?
It sits in west-central Indiana on the Illinois state line, about 24 miles west of Lafayette,
bordered by Benton, Tippecanoe, Fountain and Vermillion counties.

What is the population of Warren County?
8,440 at the 2020 census, with a 2025 estimate near 8,474 — the smallest population of any
county in Indiana.

How big is Warren County?
366.40 square miles (949.0 km2), of which 364.68 square miles are land.

What is the county seat of Warren County?
Williamsport, the county seat since 1829 and home to Williamsport Falls, Indiana’s tallest
free-falling waterfall.

How many towns are in Warren County?
Four incorporated towns — Williamsport, West Lebanon, Pine Village and State Line City
— plus about 20 smaller unincorporated communities across 12 townships.

What ZIP codes does Warren County use?
47993 for Williamsport, 47991 for West Lebanon, 47975 for Pine Village and 47982 for State Line.

What is Warren County known for?
Williamsport Falls, the state’s tallest free-falling waterfall, and being Indiana’s
least populous county.

More counties in this state: Towns and villages in Indiana.