| André-Napoléon de Fontainas | |
| Birth Name: | André-Napoléon de Fontainas |
| Birth Date: | 1807 12, df=yes |
| Birth Place: | Brussels, First French Empire |
| Death Place: | Brussels, Belgium |
| Nationality: | Belgian |
| Occupation: | lawyer, politician |
André-Napoléon Fontainas (23 December 1807 – 19 July 1863) was a Belgian liberal politician, alderman and mayor of the City of Brussels.
Fontainas was born and died in Brussels. His father came from the Auvergne region in France, and settled in Brussels in 1796 and worked in the Amigo prison. André-Napoléon graduated as a lawyer at the State University of Louvain and started working at the bar of Brussels. He was elected to the city council in 1841 and was appointed as an alderman in 1846. In 1849 he became a member of the chamber of representatives, after which he gave up his legal practice. As a politician he worked on social issues, to alleviate slum conditions and to improve educational facilities. In 1860, as first alderman of Brussels, he was appointed burgomaster by King Leopold I of Belgium. André-Napoléon de Fontainas served only for 30 months, as he died on 19 July 1863, while in office.
In recognition of his efforts for education, the city council authorised the construction of a housing block for retired teachers and the Cité Fontainas was inaugurated on 26 September 1867. Today, one of Brussels' central squares, the Place Fontainas/Fontainasplein, is also named in is honour.