
Yvelines is a department in the western part of the Île-de-France region in Northern France. In 2016, it had a population of 1,431,808. Its prefecture is Versailles, home to the Palace of Versailles, the principal residence of the King of France from 1682 until 1789, a UNESCO World Heritage Site since 1979. Yvelines' subprefectures are Saint-Germain-en-Laye, Mantes-la-Jolie and Rambouillet.

The 2015 UCI Track Cycling World Championships were the World Championships for track cycling in 2015. They took place in Saint-Quentin-en-Yvelines at the Vélodrome de Saint-Quentin-en-Yvelines from 18–22 February 2015.
The Château de Beynes is a ruined castle in the commune of Beynes in the Yvelines département of France.

The Donjon de Houdan is a medieval fortified tower in the commune of Houdan in the Yvelines département of France.
The Donjon de Maurepas is a ruined medieval castle in the town of Maurepas, in the French département of Yvelines.

Paris-Saclay is a research-intensive and business cluster currently under construction in the south of Paris, France. It encompasses research facilities, two French major universities with higher education institutions and also research centers of private companies. In 2013, the Technology Review put Paris-Saclay in the top 8 world research clusters. In 2014, it comprised almost 15% of French scientific research capacity.

The Société Française de Construction Aéronautique (SFCA) was an aircraft manufacturing company based in Buc, France.

The Château de Villiers-le-Mahieu is a modernised castle in the commune of Villiers-le-Mahieu in the Yvelines département of France. It was built in the 13th century and was extensively remodelled in the 17th. It is now in use as a hotel.