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Triel-sur-Seine: TRIEL C'EST VOUS ! won the town hall in 2026; Marine Le Pen would lead here in 2027

Triel-sur-Seine (Yvelines, INSEE 78624) has 8,948 registered voters. Its council has 33 seats; the 2026 municipal election was settled in the first round on 15 March. The next municipal elections are in 2032; the presidential election is on 18 April 2027.

The municipal election, March 2026

Round one, 15 March · 5,426 voted, 5,321 valid votes

  1. TRIEL C'EST VOUS !Miscellaneous 59.7% · 3,179 · 27 seats
  2. Ensemble pour TrielMiscellaneous 40.3% · 2,142 · 6 seats

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 Triel-sur-Seine

Triel-sur-Seine is a commune in Yvelines with 8,948 registered voters, the 36th largest of the département's 259 communes. At the municipal election of March 2026 60.6% of them voted, more than the 54.4% across Yvelines, and TRIEL C'EST VOUS ! won 27 of the council's 33 seats in the first round.

In the first round of the 2022 presidential election the commune voted Ensemble (Macron camp) 36.4%, France Unbowed 18.2%, National Rally 16.6%. Ensemble (Macron camp) did 9 points better here than across France.

Moved to today's national polls, our projection for the 2027 first round here has Marine Le Pen ahead on 28.1%, with Édouard Philippe on 21.7%.

The 2027 presidential election here, round one

Our national forecast for round one, carried down to Triel-sur-Seine from how it voted in 2022.

  1. Marine Le PenNational Rally 28.1% · France 34.2%
  2. Édouard PhilippeEnsemble (Macron camp) 21.7% · France 14.3%
  3. Jean-Luc MélenchonFrance Unbowed 14.0% · France 16.8%
  4. Raphaël GlucksmannSocialists 12.6% · France 13.4%
  5. Bruno RetailleauRepublicans 10.7% · France 7.6%
  6. Éric ZemmourReconquête 4.6% · France 3.8%
  7. Marine TondelierGreens 4.0% · France 2.9%
  8. Nicolas Dupont-AignanSovereigntists 2.2% · France 2.1%
  9. Fabien RousselCommunist Party 1.7% · France 2.0%

In 2022, round one here: Ensemble (Macron camp) 36.4% · France Unbowed 18.2% · National Rally 16.6% · Reconquête 8.1% · Republicans 6.6%. 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 →