1. Home
  2. Illinois
  3. St. Clair County
  4. O Fallon

Mercer Ct, O Fallon, IL Property Records

St. Clair County property records for 21 addresses on Mercer Ct, O Fallon, IL · Last verified August 2026

Mercer Ct Highlights

Properties 21
Median Sale Price $340,000
Deeds and Mortgages on File 43
Median Price per Sqft $296
Owner Occupied 95%
Median Annual Tax Bill $7,687
Median Year Built 2002
Median Ownership Tenure 12 years

Properties on Mercer Ct

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

419 Mercer Ct

1,440 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$208,000Aug 2014 Amount on Record Apr 2002 1 Name on Record Owner Occupied AssessorUpdated Aug 2023

View Property Record

424 Mercer Ct

4 ba · 1,140 sqft · 0.319 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$253,500May 2006 $8,1042024 Amount on Record Jul 2002 1 Name on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

View Property Record

428 Mercer Ct

1,298 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Jan 2013 Amount on Record Jun 2010 1 Name on Record AssessorUpdated Aug 2023

View Property Record

500 Mercer Ct

1,020 sqft · Built 2001 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$360,000Aug 2022 Amount on Record Nov 2015 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2023

View Property Record

504 Mercer Ct

4 ba · 1,560 sqft · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$220,000Jun 2004 Amount on Record Jul 2002 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

View Property Record

505 Mercer Ct

1,440 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$340,000Jun 2022 Amount on Record Jul 2015 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2023

View Property Record

508 Mercer Ct

4 ba · 1,224 sqft · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$340,000Apr 2024 $7,6872024 Amount on Record Feb 2022 2 Names on Record Owner Occupied Assessor + 6 DocumentsUpdated Jul 2026

View Property Record

509 Mercer Ct

1,150 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$249,500Sep 2006 Amount on Record Jul 2004 2 Names on Record Owner Occupied AssessorUpdated Aug 2023

View Property Record

512 Mercer Ct

5 ba · 1,224 sqft · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$242,000Jun 2014 Amount on Record Aug 2009 2 Names on Record Owner Occupied AssessorUpdated Aug 2026

View Property Record

513 Mercer Ct

1,020 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$310,000Sep 2022 Amount on Record Nov 2018 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2023

View Property Record

516 Mercer Ct

1,271 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
Amount on Record Sep 2002 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2023

View Property Record

517 Mercer Ct

1,314 sqft · Built 2003 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$220,000Feb 2003 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2023

View Property Record

520 Mercer Ct

4 ba · 1,350 sqft · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$400,000Jun 2024 $7,5042024 Amount on Record May 2020 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

View Property Record

524 Mercer Ct

1,560 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$310,000Nov 2021 Amount on Record Dec 2019 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2023

View Property Record

528 Mercer Ct

1,268 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$221,000Aug 2012 Amount on Record Jan 2003 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2023

View Property Record

532 Mercer Ct

1,350 sqft · Built 2002 · 0.23 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
Amount on Record Feb 2003 3 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Aug 2023

View Property Record

533 Mercer Ct

4 ba · 960 sqft · 0.25 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$213,000Jan 2024 $6,6002024 —Oct 2014 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

View Property Record

536 Mercer Ct

1,262 sqft · Built 2003 · 0.239 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$433,000Nov 2025 Amount on Record Aug 2006 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Dec 2025

View Property Record

537 Mercer Ct

1,120 sqft · Built 2002 · 0.369 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$246,500Jan 2019 Amount on Record Dec 2014 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2023

View Property Record

540 Mercer Ct

4 ba · 1,590 sqft · 0.289 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$191,500Jun 2002 Amount on Record Jan 2002 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Apr 2026

View Property Record

541 Mercer Ct

1,120 sqft · Built 2002 · 0.38 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$240,500Apr 2009 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2023

View Property Record

Wildfire Risk on Mercer Ct

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire Risk to HomesLow
this street's cells rank at the 3rd percentile of exposed land nationally · 17th in Illinois
Wildfire LikelihoodLow — less than 1 in 10,000 per year
ExposureDirect
2 of 4 cells directly exposed · 2 adjoin burnable vegetation

Property Records in Nearby Streets