Henry Gerhard Appenzeller (February 6, 1858 – June 11, 1902) was a Methodist missionary.
He and four other missionaries, including Horace N.
Allen, Horace G.
Underwood, William B.
Scranton, and Mary F.
Scranton introduced Protestant Christianity to Korea from 1885 to 1902.
His mission trip to Korea was motivated by three reasons, including: to transform Koreans to Methodism, convert Korean society with Christian teachings, and to establish democracy, modernization and independence in Korea.
He was known by his three contributions to Korean, the Paichai College Hall, the First Methodist Episcopal Church of Seoul, and the translated New Testament.