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Homes Under $300K in O'Fallon, IL
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Buy

Start here

  • Homes for sale by state
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  • The buying timeline

Afford it

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21 listings
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3 bedsNew constructionWith a pool

Homes Under $300K in O'Fallon, IL

Homes Under $300K in O'Fallon, IL

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21 Listings
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Homes Under $300K in O'Fallon, IL

21 Listings

Your local brokerage

JJ

Jeffrey Jonas

Realty.com

Lic. #471.004966

Call Jeffrey
  1. 427 W 3rd Street — photo39Active

    $199,900

    3 bd · 2 ba · 1,456 sqft

    427 W 3rd Street, O'Fallon, IL

    Whitney Wisnasky-Bettorf · Red Door Realty Group Inc

  2. 413 N Vine Street — photo48Active

    $275,000

    3 bd · 3 ba · 1,580 sqft

    413 N Vine Street, O'Fallon, IL

    Shawna Holtman · Keller Williams Pinnacle

  3. 421 W Highway 50 — photo32Active

    $299,900

    3 bd · 2 ba · 1,500 sqft

    421 W Highway 50, O'Fallon, IL

    Janell Schmittling · Homes By Janell

  4. 204 Marilyn Drive — photo44Active

    $273,000

    2 bd · 2 ba · 2,633 sqft

    204 Marilyn Drive, O'Fallon, IL

    Janet Freed · Re/Max Signature Properties

  5. 646 Rain Hollow Drive — photo22Active

    $90,000

    3 bd · 2 ba · 1,204 sqft

    646 Rain Hollow Drive, O'Fallon, IL

    Jeb Blasingame · Keller Williams Marquee

  6. 713 Hartman Lane — photo10Active

    $197,000

    2 bd · 1 ba · 1,450 sqft

    713 Hartman Lane, O'Fallon, IL

    Cathleen Bollmeier · Coldwell Banker Brown Realtors

  7. 287 Eagle Ridge — photo19Active

    $115,000

    2 bd · 1 ba · 1,008 sqft

    287 Eagle Ridge, O'Fallon, IL

    Kevin Beck · Kunkel Wittenauer Group, Inc

  8. 207 Marilyn Drive — photoPrice Reduced31Active

    $239,900

    3 bd · 3 ba · 1,755 sqft

    207 Marilyn Drive, O'Fallon, IL

    Courtney Marsh · Red Door Realty Group Inc

  9. 118 Alice — photo17Active

    $239,900

    3 bd · 2 ba · 1,454 sqft

    118 Alice, O'Fallon, IL

    Sharon Zrenner · Real Estate Pro's, LLC

  10. 732 Seagate Drive — photo20Active

    $135,000

    — bd · — ba · — sqft

    732 Seagate Drive, O'Fallon, IL

    Jeb Blasingame · Keller Williams Marquee

  11. 1513 Royal Oak Court — photoPrice Reduced27Active

    $255,000

    3 bd · 2 ba · 1,777 sqft

    1513 Royal Oak Court, O'Fallon, IL

    LaToya Berry-Coleman · Keller Williams Pinnacle

  12. 504 W Fourth Street — photo30Active

    $209,900

    3 bd · 1 ba · 1,320 sqft

    504 W Fourth Street, O'Fallon, IL

    Courtney Marsh · Red Door Realty Group Inc

  13. 1020 N Smiley Street — photo43Active

    $300,000

    4 bd · 3 ba · 2,378 sqft

    1020 N Smiley Street, O'Fallon, IL

    Jean Lewis · Keller Williams Pinnacle

  14. 401 Ponderosa 2 — photoPrice Reduced26Active

    $134,900

    2 bd · 2 ba · 1,100 sqft

    401 Ponderosa 2, O'Fallon, IL

    Lacey Dore · Re/Max Signature Properties

  15. 107 Brookside Drive — photoPrice Reduced12Active

    $199,900

    3 bd · 1 ba · 768 sqft

    107 Brookside Drive, O'Fallon, IL

    Jeffrey Birkenmeier · Worth Clark Realty

  16. 304 Eagle Ridge — photoPrice Reduced29Active

    $105,000

    2 bd · 1 ba · 868 sqft

    304 Eagle Ridge, O'Fallon, IL

    Brad Copelin · Judy Dempcy Homes Powered by KW Pinnacle

  17. 1516 English Pine — photo32Active

    $205,000

    2 bd · 2 ba · 1,000 sqft

    1516 English Pine, O'Fallon, IL

    Robin Ortiz · RE/MAX Results Realty

  18. 1805 Creekview Drive — photoPrice Reduced30Active

    $92,000

    2 bd · 2 ba · 1,056 sqft

    1805 Creekview Drive, O'Fallon, IL

    Christina Johnson · Keller Williams Pinnacle

  19. 506 E Washington Street — photo28Active

    $289,900

    4 bd · 3 ba · 1,569 sqft

    506 E Washington Street, O'Fallon, IL

    Whitney Wisnasky-Bettorf · Red Door Realty Group Inc

  20. 807 Estate Drive — photo19Active

    $140,000

    3 bd · 1 ba · 936 sqft

    807 Estate Drive, O'Fallon, IL

    Megan Schobert · Keller Williams Pinnacle

  21. 164 Eagle Ridge — photo15Active

    $80,000

    1 bd · 1 ba · 600 sqft

    164 Eagle Ridge, O'Fallon, IL

    Kathryn Clark · RE/MAX Alliance

Explore O Fallon homes

By price

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The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Listing data is derived from various Multiple Listing Services; each source MLS and its required disclaimer are shown with the listings on the applicable page. Realty.com is an independently owned and operated brokerage.

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Listing data & MLS disclosures

MARIS MLS
Based on information submitted to the MLS GRID as of 2026-09-02 14:47:53 UTC. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
    • New construction
    • With a pool

    Your local brokerage

    JJ

    Jeffrey Jonas

    Realty.com

    Lic. #471.004966

    Call Jeffrey

    O'Fallon, IL community profile

    Population
    31,290
    Median income
    $101,491
    Housing units
    12,629
    People per sq. mi.
    1,967.9
    Area
    15.9 sq. mi.

    Source: HJN community data

    O'Fallon housing market

    July 2026 · This period is still settling

    Homes on the market · MLS, as of Jul 17, 2026–Jul 21, 2026

    Median list price
    $439,900
    Homes for sale
    81
    Median days on market
    28 days

    Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Jul 15, 2026

    Median home size
    1,288 sq. ft.