Harvester topographic map

O’Fallon is situated on gently rolling terrain that characterizes much of the St. Charles County landscape. The area features elevations ranging from about 400 to 600 feet above sea level, with the land gradually rising as it moves away from the Missouri River to the east. The city is interspersed with a mix…

Average elevation: 160 m

Average elevation: 178 m

Average elevation: 155 m

Average elevation: 155 m

Average elevation: 160 m

Average elevation: 183 m

Average elevation: 206 m

Average elevation: 160 m

Average elevation: 177 m

Average elevation: 146 m

Average elevation: 146 m

Average elevation: 156 m

Average elevation: 169 m

Average elevation: 169 m

Average elevation: 160 m

Average elevation: 183 m

Average elevation: 178 m

Average elevation: 154 m

Average elevation: 183 m

Average elevation: 155 m

Average elevation: 216 m

Average elevation: 216 m