There are
418 mi
from Sioux City, IA to Marshfield, WI
That's the driving distance. It would take 8 hours 28 mins to go from Sioux City, Iowa to Marshfield, Wisconsin.
The flight distance (direct flight from Sioux City, IA to Marshfield, WI) is 345.75 mi.
418 mi = 672.01 kms