paris to versaille train

Take the RER Line C train to Versailles Rive-Gauche which is the nearest station to the Chateau. If you're in the St Germain des Pres area it should be an easy walk to get that line at either of the Saint-Michel-Notre-Dame or Musee d'Orsay stations. There is a constant looped announcement in multiple languages in the central Paris line C stations about how to get to Versailles, but you want a train with Versailles Rive-Gauche as the final destination. The platform information boards will name Versailles Rive-Gauche, but the trains only have four-letter codes on the front: you want one that says VICK.