Josef Anton or Joseph-Antoine Froelicher or Frölicher (1790 - 9 January 1866, Paris) was a Swiss architect.
Coming from an old middle class family from Solothurn, Froelicher begins his architectural studies in Switzerland, receiving his degree in Solothurn in 1809. He then left for Paris, endowed with a pension from the Swiss government to complete his studies in Paris. He entered the école des Beaux-Arts in 1809, gallicizing his name into Joseph Antoine Frelicher, then Froelicher.
Architect to many families of the high French aristocracy, he built many châteaux and hôtels particuliers. A Legitimist monarchist, he became the official architect to the duchess of Berry, which brought him much ill-feeling at the time of the July Revolution. He was made a naturalised Frenchman in 1821, and his daughter married the architect Henri Parent.