O'Fallon Missouri in Zip Code 63366
O'Fallon Missouri in Zip Code 63366 . (find on map) estimated zip code population in 2016: 35,750 zip code population in 2000: O'Fallon Missouri Street Map 2954074 from www.landsat.com Dardenne, ofallon, st peters stats and demographics for the 63366 zip code. 7 rows on this page, we'll list out the 7 zip codes we have on record for o'fallon, missouri in. O fallon, missouri zip code map & detailed profile: