Niels Jacobsen (14 September 1865 - 31 January 1935) was a Danish architect and politician who worked primarily in Odense.
Graduating in 1890, he was subsequently employed by Johan Daniel Herholdt, Ferdinand Meldahl, and Martin Nyrop.
From 1894 to 1908, he taught at Odense Technical College, served on the Board of Directors 1909-25, and participated in architectural competitions as a judge.
Jacobsen was a member of the Odense City Council 1909-25, and chairman from 1911.
On August 11, 1893, he married Christiane Sophie Magdalene Bertram Petersen Møller (born 1872, Gråsten).