As of today, , there are 144 properties listed for sale in ZIP code 62269 and 144 properties listed for sale in the city of O Fallon. Of those 144 properties, there are 140 single family houses and 4 condos. The last known list price for 512 Mercer Ct was $234,500, which is 0.6% below the current median price of $236,000 for O Fallon and 0.6% below the median of $236,000 for 62269. 512 Mercer Ct is a single family residential home that is approximately 1,224 Sqft, which is 39% below the median size in O Fallon of 2,013 square feet and 39% below the median size in 62269 of 2,013 square feet. This property's price per Sqft was $192, which is 78% above the current median in 62269 of $108 and 78% above the O Fallon median of $108.