Porcupine is a census-designated place in Sioux County, North Dakota, United States.

It lies only a few minutes' drive from the city of Selfridge.

An unincorporated community, it was designated as part of the U.S. Census Bureau's Participant Statistical Areas Program on March 22, 2010.

[3] The only access to the town is B.I.A Road 7 from North Dakota State Highway 6.

[citation needed] It is in the Fort Yates School District,[6] which is integrated with Standing Rock Community School.