There are
1,876 mi
from Redwood City, CA to Marshalltown, IA
That's the driving distance. It would take 1 day 8 hours to go from Redwood City, California to Marshalltown, Iowa.
The flight distance (direct flight from Redwood City, CA to Marshalltown, IA) is 1,581 mi.
1,876 mi = 3,018.40 kms