Lying in the northwest corner of North Korea, Sindo borders the
People's Republic of China to the north and west, and faces the
Yellow Sea to the south; to the east, it looks across a narrow expanse of sea at Ryongch'ŏn. Much of the county's land has been
reclaimed through draining and filling. There are various islands offshore, and together with the Sindo archipelago make up the
kun. The island of Pidansŏm is the westernmost point in Korea; it was formed by a 1958 reclamation project from several smaller islands. Other islands include
Hwanggumpyong,
Ssarisŏm,
Kanŭnsŏm,
Munbakto, and
Wihwa. There are various
alluvial plains and extensive reed fields. ==Administrative divisions==