A Nymph by a Stream

{{Short description|Painting by Pierre-Auguste Renoir}}

{{Infobox artwork|image=Pierre-Auguste Renoir 086.jpg|title=A Nymph by a Stream|medium=Oil on canvas|artist=Pierre-Auguste Renoir|year=1869–70|height_metric=66.5|width_metric=124|museum=National Gallery|city=London}}

A Nymph by a Stream is an oil painting of 1869–70 by Pierre-Auguste Renoir which is held in the collection of the National Gallery, London.{{citation|url=https://www.nationalgallery.org.uk/paintings/pierre-auguste-renoir-a-nymph-by-a-stream|title=A Nymph by a Stream|publisher=The National Gallery|accessdate= 14 January 2020}} The painting portrays Renoir's 21-year-old model and lover, Lise Tréhot, who featured in over twenty of his paintings during the years 1866 to 1872.

Unusually, the painting is a combination of a classical depiction of a naiad or river nymph reclining by a stream and the recognisable portrait of an actual person.