Williamson County IL FSBO Homes (574)

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We have homes for sale by owner in Williamson County, IL. The median list price in Williamson County, IL is $409,205 and the average price per square foot is $1,401.

$290,000

4 Bed
2 Bath
1,750 Sqft

6005 E Grand Avenue, Williamson County, IL

Discover a pristine new construction residence at 6005 e grand ave in carterville, il. this thoughtfully... Read More

$549,900

4 Bed
3 Bath
3,877 Sqft

608 N Saluki Drive, Williamson County, IL

This beautiful 4 bed 3 bath home in saluki national country club is a must see! over 3800 sq ft, 4 bedrooms plus... Read More

$289,000

4 Bed
3 Bath
2,312 Sqft

11371 Cunningham Lane, Williamson County, IL

Welcome to your own private slice of heaven just south of marion. this gorgeous country home sits on 3/4... Read More

Vacant Land For Sale

$25,000

0.435 Acre(Lot)

Lot 14 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

Vacant Land For Sale

$30,000

0.605 Acre(Lot)

Lot 15 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

Vacant Land For Sale

$35,000

0.95 Acre(Lot)

Lot 17 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

Vacant Land For Sale

$25,000

0.464 Acre(Lot)

Lot 16 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

Vacant Land For Sale

$35,000

0.908 Acre(Lot)

Lot 18 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

Vacant Land For Sale

$30,000

0.673 Acre(Lot)

Lot 19 Joy Lane, Williamson County, IL

Build your dream home in one of johnston city’s most desirable subdivisions! these beautiful lots in tomahawk... Read More

$269,900

3 Bed
3 Bath
3,610 Sqft

1011 W Goodall Street, Williamson County, IL

This well maintained custom built bradford stone home is just what you have been looking for! step inside to... Read More

$335,500

4 Bed
2 Bath
1,906 Sqft
1.06 Acres(Lot)

850 Castle Rock Lane, Williamson County, IL

Carterville school district! thinking of building a house but don't want the hassle of a construction loan or do... Read More

$159,500

2 Bed
2 Bath
1,276 Sqft
6.15 Acres(Lot)

9462 Stanley Lane, Williamson County, IL

Two bedroom, two bath ranch on over 6 wooded acres including beautiful pine trees. just west of marion.... Read More

$45,000

2 Bed
1 Bath
1,012 Sqft

209 N Olive Street, Williamson County, IL

Spacious 2 bedroom 1 bath home, with a little tlc this could make a great investment. features a covered front... Read More

$200,000

2 Bed
2 Bath
1,200 Sqft

1609 W Chestnut Street, Williamson County, IL

Brand new construction with quality craftsmanship & low-maintenance living step into the ease of new... Read More

$199,900

3 Bed
2 Bath
1,350 Sqft

112 Townhouse Drive, Williamson County, IL

Move in ready and priced to sell! you better take a look at this 3 bedroom 2 bath home located on the outskirts... Read More

$145,000

2 Bed
1 Bath
2,064 Sqft
14.587 Acres(Lot)

2601 Nielson Crossing Road, Williamson County, IL

Being sold as-is where is. this 2 bedroom, 1 bathroom home sits on over 14 acres in marion, il, just minutes... Read More

$65,000

2 Bed
1 Bath
804 Sqft
0.51 Acre(Lot)

204 E Hocking Valley Avenue, Williamson County, IL

Charming small bungalow. a cozy home with timeless appeal nestled in a quiet and friendly neighborhood, this... Read More

$179,900

2 Bed
1 Bath
1,220 Sqft
1.28 Acres(Lot)

1210 Peterson Avenue, Williamson County, IL

This tidy and well-loved home has had only two owners and sits on a cozy corner lot surrounded by shady trees,... Read More

$224,900

4 Bed
2 Bath
1,680 Sqft
0.3 Acre(Lot)

713 E Main Street, Williamson County, IL

Historic charm meets modern comfort! this beautifully restored 4-bedroom, 1.5-bath home is a perfect blend of... Read More

$60,000

3 Bed
2 Bath
1,216 Sqft
0.118 Acre(Lot)

1535 Maureen Avenue Drive, Williamson County, IL

Come see this affordable mobile home with 3 bedrooms and 2 full baths. very well taken care of with updates.... Read More

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Williamson County - Statistics and Home Trends

Actives Activity Chart

Homes For Sale Buy Owner in Williamson County 185

	Average Price
1 Bed Homes For Sale in Williamson County (5)	$ 84,600
2 Bed Homes For Sale in Williamson County (29)	$ 124,279
3 Bed Homes For Sale in Williamson County (91)	$ 227,223
4 Bed Homes For Sale in Williamson County (40)	$ 391,097
5+ Bed Homes For Sale in Williamson County (19)	$ 678,572

AVERAGE PRICE

$ 301,154

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

$ 137

Townhomes For Sale Buy Owner in Williamson County 8

	Average Price
2 Bed Townhomes For Sale in Williamson County (1)	$ 249,900
3 Bed Townhomes For Sale in Williamson County (5)	$ 339,260
4 Bed Townhomes For Sale in Williamson County (2)	$ 233,750

AVERAGE PRICE

$ 291,085

NEW LISTINGS THIS WEEK

7

PRICE PER SQUARE FOOT

$ 146

Land For Sale Buy Owner in Williamson County 130

	Average Price
Land For Sale in Williamson County (130)	$ 312,906

AVERAGE PRICE

$ 312,906

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

$ N/A

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Learn More About Williamson County, Illinois

Currently there are 185 homes for sale, 130 vacant land for sale and 8 townhomes for sale in Williamson County

Currently Williamson County has 323 properties on the market for sale. The inventory was last updated 06/09/2025. Of these properties, 185 single family homes are for sale by their owners in Williamson County, and 0 condos are for sale by their owners in Williamson County. The average price of the single family homes for sale in Williamson County, is $301,154, the average condo price in Williamson County, is $291,085. The average price per square foot of the active inventory is $94. This is based the living area square footage.

Over the last year, there have been 0 of properties sold in Williamson County. Of these properties, 0 single family homes have sold by their owners in Williamson County, and 0 condos have sold by their owners in Williamson County. The average sales price of the single family homes sold in Williamson County, is $. Single family homes have been selling for per square foot of living area. The average sales price of the condos for sale in Williamson County, is $. Condos have been selling for per square foot of living area.

If you are thinking of selling your Williamson County home, try our flat fee listing service, Our list fees start at $449, and may save you $15,000 in real estate commissions. Click here to start saving.

Disclaimer: Listing broker has attempted to offer accurate data, but buyers/lessees are advised to confirm all information IDX information is provided exclusively for consumers' personal, non-commercial use that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and that data is deemed reliable but is not guaranteed accurate by the MLS. The MLS may, at its discretion, require use of other disclaimers as necessary to protect Participants and/or the MLS from liability.
This data up-to-date as of 06/09/2025

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