Louis-Daniel Perrier (1818–1903) was a Swiss architect from Neuchâtel, Switzerland.
He was born in Paris although he was originally from the towns of Sainte-Croix and Orges in Switzerland.
He studied art in Paris and Berlin before moving to Neuchâtel in 1848.
He constructed Philippe Suchard's house, the church of Les Brenets, the primary school "Le Collège de la Promenade" in Neuchâtel, and restored the castles of Neuchâtel and Cormondrèche among other works.
He was married to Cécile Dardel and is the father of the Federal Councillor Louis Perrier.