Grønningen is a Danish artists cooperative whose members arrange exhibitions and similar events.
It is named after the street Grønningen in Copenhagen where the first art exhibition was held.
Initially, it brought together artists interested in radical and experimental art who had been members of Den Frie Udstilling ("The Free Exhibition").
Most prominent in the early years were artists such as Harald Giersing, Sigurd Swane, Olaf Rude, William Scharff, Fritz Syberg and Johannes Larsen.
They were soon joined by Vilhelm Lundstrøm, Svend Johansen, Axel Salto, Jens Søndergaard, Niels Lergaard, Erik Hoppe, Christine Swane, Astrid Noack and Gottfred Eickhoff.