Pierrefitte-sur-Seine (French pronunciation: [pjɛfit syʁ sɛn] , lit. 'Pierrefitte on Seine') is a former commune in the Seine-Saint-Denis department and Île-de-France region of France, since 2025 a part of Saint-Denis, following a vote of both municipal councils on 30 May 2024. It forms part of the northern suburbs of Paris, and lies 12.4 km (7.7 mi) from the centre of the French capital.

The arms of Pierrefitte-sur-Seine are blazoned: Gules, 3 rocks argent, perched on the center one a finch Or, on a chief azur a nail argent between 2 fleurs de lis Or.

In December 2005, Pierrefitte became Europe's first "Mediation Town".

Historical population

Year Pop. ±% p.a. 1793 750 —     1800 706 −0.86% 1806 734 +0.65% 1821 705 −0.27% 1831 812 +1.42% 1836 789 −0.57% 1841 827 +0.95% 1846 813 −0.34% 1851 808 −0.12% 1856 829 +0.51% 1861 915 +1.99% 1866 1,075 +3.28% 1872 1,157 +1.23% 1876 1,151 −0.13% 1881 1,346 +3.18% 1886 1,609 +3.63% 1891 1,824 +2.54% 1896 2,468 +6.23%	Year Pop. ±% p.a. 1901 2,863 +3.01% 1906 3,349 +3.19% 1911 4,268 +4.97% 1921 5,987 +3.44% 1926 8,609 +7.53% 1931 11,645 +6.23% 1936 12,575 +1.55% 1946 12,100 −0.38% 1954 12,867 +0.77% 1962 14,770 +1.74% 1968 19,017 +4.30% 1975 20,819 +1.30% 1982 22,366 +1.03% 1990 23,822 +0.79% 1999 25,816 +0.90% 2007 28,338 +1.17% 2012 27,925 −0.29% 2017 30,306 +1.65%
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Source: EHESS and INSEE (1968-2017)

The town is served by Pierrefitte – Stains railway station on line D of the RER regional suburban rail network.

The south of the commune, where the National Archives of France relocated in 2013, is also served by Saint-Denis – Université station on Paris Métro Line 13. This station lies on the border between the communes of Pierrefitte-sur-Seine and Saint-Denis.

Primary and secondary schools in the commune included:

• Nine preschools (maternelles)
• Eight elementary schools
• Two junior high schools: Collège Gustave-Courbet and Collège Pablo-Neruda

Collège intercommunal Lucie-Aubrac in Villetaneuse also served Pierrefitte students, as did Lycée Polyvalent Maurice-Utrillo, a senior high school/sixth-form college in Stains.

Paris 8 University and Paris 13 University served area students.

Pierrefitte was where comedian and filmmaker Kheiron was raised, and the setting for his award-winning film All Three of Us.

• The actor and playwright Frédérick Lemaître lived in Pierrefitte between 1830 and 1845.
• The naturalist Alcide d'Orbigny died in Pierrefitte in 1857 and is buried in the municipal cemetery.

Pierrefitte is twinned with

• Braintree in the United Kingdom
• Rüdersdorf bei Berlin in Germany.

• Communes of the Seine-Saint-Denis department

• Former official web portal of the town of Pierrefitte-sur-Seine (in French)