Billings County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 945, making it the second-least populous county in North Dakota. Its county seat and only incorporated place is Medora.

Frederick H. Billings was an American lawyer, financier, and politician. He is known for his legal work on land claims during the early years of California's statehood and his presidency of the Northern Pacific Railway from 1879 to 1881.