As of today, , there are 138 properties for sale in the 62269 area and 138 properties listed for sale in the city of O Fallon. This single family residential home at 512 Mercer Ct in ZIP code 62269 was last listed for $234,500. This is 2% above the current $229,985 median price for O Fallon and 2% above the median of $229,985 for the ZIP code. Of the 138 properties for sale in O Fallon, 135 are single family homes and 3 are condos. 512 Mercer Ct is a single family residential home that is approximately 1,224 square feet, 40% below the city median of 2,041 and 40% below the 62269 ZIP code median of 2,041. The price per square foot was $192 which is 75% above the current median price in 62269 of $110 and 75% above the O Fallon median of $110 per square foot.