Henri Frédéric Amiel (September 27, 1821 in Geneva – May 11, 1881 in Geneva) was a Swiss moral philosopher, poet, and critic.

Amiel's ("Private Journal"), which, published after his death, obtained a European reputation. It was translated into English by British writer Mary Augusta Ward at the suggestion of academic Mark Pattison.

Although modest in volume of output, Amiel's mind was of no inferior quality, and his Journal gained a sympathy that the author had failed to obtain in his life. In addition to the Journal, he produced several volumes of poetry and wrote studies on Erasmus, Madame de Stael and other writers. His extensive correspondence with Égérie, his muse name for Louise Wyder, was preserved and published in 2004.