Hoengseong County is a county located in southwestern Gangwon Province, South Korea, bordering Pyeongchang-gun to the east, Yangpyeong-gun, Gyeonggi-do to the west, Hongcheon-gun to the north, and Wonju-si and Yeongwol-gun to the south.

Gangwon State is a Special Self-Governing Province of South Korea and the least densely populated subdivision of the country. Gangwon is one of the three provinces in South Korea with special self-governing status, the others being Jeju Province and Jeonbuk State. On the east bound by the East Sea, it borders Gyeonggi Province to its west, North Gyeongsang Province and North Chungcheong Province to its south, and the Military Demarcation Line to the north, separating it from North Korea's Kangwŏn Province. Before the division of Korea in 1945 Gangwon and Kangwŏn Provinces formed a single province.