Marshall County Post Offices

200 Marshall St
Alvarado, Minnesota 56710

108 W 3rd St
Argyle, Minnesota 56713

208 Hill Ave S
Middle River, Minnesota 56737

120 S Main St
Newfolden, Minnesota 56738

312 Main St
Oslo, Minnesota 56744

422 5th St
Stephen, Minnesota 56757

108 Main St
Strandquist, Minnesota 56758

101 N Main St
Viking, Minnesota 56760

520 N Minnesota St
Warren, Minnesota 56762

Marshall County

There are 9 US Post Offices in Marshall County serving a total of 8,496 residents equating to 944 residents per post office. It's estimated that approximately 13,561 packages are handled across the 9 county post offices annually. Marshall County is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 9,439. Its county seat is Warren. Marshall County was the location of a claimed UFO incident in 1979, the Val Johnson incident."