Christian Mortensen (August 16, 1882 – April 25, 1998) was a Danish-American supercentenarian.
When he died, his age of 115 years, 252 days was the longest verified lifespan of any male in modern history until 28 December 2012, when Jiroemon Kimura of Japan surpassed this record.
Mortensen was the first man confirmed to reach age 115 (in 1997).
Mortensen was baptized in Fruering Church on December 26, 1882.
Besides his baptismal record, other records include the 1890 and 1901 census enumerations in Denmark, and church confirmation in 1896.