Mountain Lake Park, Maryland Area Code

Mountain Lake Park, MD is officially utilizing an area code overlay in which area codes 240 and 301 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Mountain Lake Park, MD area code information read more about area codes 240 and 301 details and Maryland area codes.

Mountain Lake Park, MD is located in Garrett County and observes the Eastern Time Zone. View our Times by Area Code tool.