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Poissy: Sandrine Berno Dos Santos's list won the town hall in 2026; Jean-Luc Mélenchon would lead here in 2027

Poissy (Yvelines, INSEE 78498) has 23,795 registered voters. Its council has 43 seats; the 2026 municipal election went to a second round on 22 March. The next municipal elections are in 2032; the presidential election is on 18 April 2027.

The municipal election, March 2026

Round two, 22 March · 13,546 voted, 12,984 valid votes

  1. ENSEMBLE POUR POISSYLed by Sandrine Berno Dos Santos · Miscellaneous right 53.0% · 6,876 · 33 seats
  2. KO 2026Led by Karl Olive · Miscellaneous right 47.0% · 6,108 · 10 seats

Round one, 15 March · 13,598 voted, 13,294 valid votes

  1. KO 2026Miscellaneous right 42.6% · 5,664
  2. ENSEMBLE POUR POISSYMiscellaneous right 32.4% · 4,310
  3. Mieux Vivre Poissy, la gauche et l'écologie avec vousUnion of the left 9.6% · 1,271
  4. Poissy PopulaireFrance Unbowed 6.3% · 842
  5. PASSIONNEMENT POISSYMiscellaneous 4.5% · 597
  6. Poissy Debout !Miscellaneous left 3.5% · 464
  7. Lutte ouvrière - Le camp des travailleursFar left 1.1% · 146

Official results, Ministère de l'Intérieur. Lists are labelled with the ministry's political "nuance"; lists in small communes carry none. The list that comes first takes half the seats as a bonus, and the rest are shared in proportion among lists over 5%.

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About Poissy

Poissy is a commune in Yvelines with 23,795 registered voters, the 5th largest of the département's 259 communes. At the municipal election of March 2026 57.1% of them voted, more than the 54.4% across Yvelines, and the list led by Sandrine Berno Dos Santos won 33 of the council's 43 seats after a second round.

In the first round of the 2022 presidential election the commune voted Ensemble (Macron camp) 31.3%, France Unbowed 31%, National Rally 12.1%. National Rally did 11 points worse here than across France.

Moved to today's national polls, our projection for the 2027 first round here has Jean-Luc Mélenchon ahead on 25%, with Marine Le Pen on 22.2%.

The 2027 presidential election here, round one

Our national forecast for round one, carried down to Poissy from how it voted in 2022.

  1. Jean-Luc MélenchonFrance Unbowed 25.0% · France 16.8%
  2. Marine Le PenNational Rally 22.2% · France 34.2%
  3. Édouard PhilippeEnsemble (Macron camp) 17.8% · France 14.3%
  4. Raphaël GlucksmannSocialists 13.3% · France 13.4%
  5. Bruno RetailleauRepublicans 10.7% · France 7.6%
  6. Marine TondelierGreens 3.7% · France 2.9%
  7. Éric ZemmourReconquête 3.4% · France 3.8%
  8. Nicolas Dupont-AignanSovereigntists 1.9% · France 2.1%
  9. Fabien RousselCommunist Party 1.4% · France 2.0%
  10. Nathalie ArthaudFar left 0.5% · France 0.6%

In 2022, round one here: Ensemble (Macron camp) 31.3% · France Unbowed 31.0% · National Rally 12.1% · Republicans 6.5% · Reconquête 6.2%. Each political family moves by its national change since 2022 (half uniform, half proportional), scaled so that every commune adds up to our national forecast. The national forecast →

Communes of a similar size in Yvelines

Every commune in Yvelines → · All of France →