Bobigny (French pronunciation: [bɔbiɲi]) is a commune, or town, in the northeastern suburbs of Paris, Île-de-France, France. It is located 9.1 km (5.7 mi) from the centre of Paris. Bobigny is the prefecture (capital city) of the Seine-Saint-Denis department, as well as the seat of the Arrondissement of Bobigny. It is the 9th most populous commune in Seine-Saint-Denis (2023).

Inhabitants are called Balbyniens in French. The first IKEA store in France was located in this commune.

Bobigny is an urban commune, as it is one of the dense or intermediate density communes, as defined by the Insee communal density grid. It belongs to the urban unit of Paris, an inter-departmental conurbation comprising 407 communes and 10,785,092 inhabitants in 2017, of which it is a suburban commune.

The commune is also part of the functional area of Paris where it is located in the main population and employment centre of the functional area. This area comprises 1,929 communes.

Bobigny is served by two stations on Paris Métro Line 5: Bobigny – Pantin – Raymond Queneau and Bobigny – Pablo Picasso. It can also be reached from the outer terminus of Paris Métro Line 7 at La Courneuve.

Valeo has management branches (Valeo Transmissions group and Valeo Friction Materials group) here. It was also the manufacturing base used by Meccano for French Dinky Toys from 1933 until 1970, when the factory was closed and later demolished. Production of Dinky Toys was then transferred to the Meccano factory in Calais until 1972, when the last new model, a Renault 4 la poste, was produced.

Its name is derived from Roman-period Balbiniacum, "the place of Balbo or Balbinus or Balbinius"; or "of the dumb or silent man/men" (Gaulish: Irish Gaelic balbh = "dumb, silent").

During the Second World War, approximately 20,000 jews were transported from Bobigny station to their deaths in Nazi concentration camps.