The Rural Municipality of Coalfields No. 4 is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 1 and SARM Division No. 1. Located in the southeast portion of the province, it is adjacent to the United States, neighbouring Burke County, North Dakota.

Burke County is a county on the north edge of the U.S. state of North Dakota, adjacent to the south line of Canada. As of the 2020 census, the population was 2,201. The county seat is Bowbells. The county is named after John Burke, the tenth Governor of North Dakota.