Osny Annual Flea Market
The great autumn gathering organised by Osny Town Hall in the heart of the Cergy-Pontoise conurbation
About Osny Annual Flea Market
Osny Annual Flea Market: a Municipal Tradition
Osny is one of the communes making up the Cergy-Pontoise conurbation, nestled between the Oise meanders and the wooded slopes of the Vexin. Every autumn, Osny Town Hall directly organises its annual flea market on Rue Aristide Briand, the main street of the town centre.
Open from 8 AM to 6 PM, the event welcomes private sellers and bargain-hunters for a lively day of second-hand trading. Furniture, clothing, appliances, toys, books and decorative items change hands throughout the day. Free entry for visitors.
Seller registrations open in May and close at the end of June. Pitch fees are deliberately kept accessible: €10 for 2 metres (Osny residents) and €20 for 2 metres (non-residents). Contact: Osny Town Hall, tel. 01 34 25 42 31, osny.fr.
Osny Annual Flea Market — edition 2026
Prices Osny Annual Flea Market 2026
Practical information — Osny Annual Flea Market
Practical Information
Venue
Rue Aristide Briand, 95520 Osny (town centre)
Getting There
By car via D14 towards Osny centre. Parking in adjacent streets. By public transport, bus from Cergy-Préfecture RER A station or from Pontoise.
Hours
8 AM to 6 PM.
Admission
Free entry for visitors. Seller pitch fees apply (€10–€20 for 2 m depending on residency).
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