There are
571 mi
from Dearborn, MI to Marshalltown, IA
That's the driving distance. It would take 10 hours 38 mins to go from Dearborn, Michigan to Marshalltown, Iowa.
The flight distance (direct flight from Dearborn, MI to Marshalltown, IA) is 498.31 mi.
571 mi = 919.38 kms