Altenkirchen (German: [ˈaltn̩kɪʁçn̩] ) is a town in Rhineland-Palatinate, Germany, capital of the district of Altenkirchen. It is located approximately 40 km east of Bonn and 50 km north of Koblenz. Altenkirchen is the seat of the Verbandsgemeinde ("collective municipality") Altenkirchen-Flammersfeld.

Year	Inhabitants
1787	112
1800	450
1830	990
1853	1,497
1861	1,700
1900	2,044
1933	3,333
1939	3,562
1950	4,189
1962	4,618
1984	4,553
1999	6,640
2014	6,162

• Lahrer Herrlichkeit, a landscape region in the collective municipality of Flammersfeld

• Dirk Adorf (born 1969), race car driver
• Sabine Bätzing-Lichtenthäler (born 1975), politician (SPD)
• Dittmar Hahn (born 1943), former judge of the Federal Administrative Court
• Claus Koch (born 1953), jazz musician
• Ernst Lindemann (1894–1941), an officer of the Imperial Navy and later the Navy commander of the battleship Bismarck
• Hermann Heinrich Traut (born 1866), librarian
• Marie Gülich (born 1994), WNBA player.

The following figures are not native Altenkirchen people, but have worked or lived in the city:

• Wilhelm Boden (1890–1961), former Prime Ministers of Rheinland-Pfalz
• Ludwig Julius Budge (1811–1888), physician
• Bernhard Grzimek (1909–1987), zoologist, cooperated in 1938 with the District Veterinary Office in Altenkirchen to combat bovine tuberculosis
• François Séverin Marceau (1769–1796), French general
• Krzysztof Meyer (born 1943), composer
• Hans Nüsslein (1910–1991), German tennis player, professional world champion in 1933, 1936, 1937
• Friedrich Wilhelm Raiffeisen (1818–1888), social reformer
• Ewald Schnug sen. (1930–2013), Master Gardener, Bearer of the Federal Cross of Merit, First Alderman of Altenkirchen, Gamekeeper's ring leader, County hunting master
• Ewald Schnug (* 1954), agricultural researcher, professor, Honorary-President of the International Scientific Center for Fertilizers