Hwanghae Province (Hwanghae-do ) was one of the Eight Provinces of Korea during the Joseon era. Hwanghae was located in the northwest of Korea. The provincial capital was Haeju. The regional name for the province was Haeseo (). It is a region of Korea that occupies what is now North Hwanghae and South Hwanghae provinces of North Korea, as well as Baengnyeong Island and Ongjin County of South Korea.
Etymology
The name of the region, Haeseo, means "West of the Sea", in reference to the region being to the west of Gyeonggi Bay, the portion of the Yellow Sea offshore of Incheon and Ganghwa Island.
==History==<!-- This section is linked from Provinces of Korea -->
In 1395, the province was organized as Punghae (). In 1417, the province was renamed Hwanghae. The name derived from the names of the two principal cities of Hwangju () and Haeju ).
In 1895, the province was reorganized into the Districts of Haeju () in the west and Gaeseong () in the east, but in 1896, a new system of thirteen provinces was established, and Hwanghae Province was reconstituted.
In 1910, Korea was annexed into the Empire of Japan, and its administrative divisions were rearranged. Hwanghae Province was reorganized into Kōkai-dō, with Kaishū (Haeju) serving as its capital.