Area Code Lookup
What Area Code Is Willmar?
Area code 320 · Minnesota
Willmar uses area code 320. It is located in Minnesota.
Area Code Serving Willmar
Frequently Asked Questions
What area code is Willmar?
Willmar uses area code 320. It is located in Minnesota.
How do I call Willmar from outside the US?
To call Willmar from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-320-XXX-XXXX). The +1 is the country code for all NANPA countries.