As of today, , there are 6 properties for sale in the 62864 area and 6 properties listed for sale in the city of Mount Vernon. This single family residential home at 507 S 20th St in ZIP code 62864 was last listed for $85,500. This is 511% above the current $14,000 median price for Mount Vernon and 511% above the median of $14,000 for the ZIP code. Of the 6 properties for sale in Mount Vernon, 6 are single family homes and 0 are condos. 507 S 20th St is a single family residential home that is approximately 1,218 square feet, 2% above the city median of 1,194 and 2% above the 62864 ZIP code median of 1,194. The price per square foot was $70 which is 400% above the current median price in 62864 of $14 and 400% above the Mount Vernon median of $14 per Sqft.