Pieter Tjarck is a portrait painting by the Dutch Golden Age painter Frans Hals, painted in 1638 and now in the Los Angeles County Museum of Art, Los Angeles.

The painting shows a fashionably dressed gentleman leaning over the back of a chair holding a rose.

This painting was documented by Ernst Wilhelm Moes in 1909 and Hofstede de Groot in 1910, who wrote:PIETER TJARCK.

He is in black with a big broad hat and a soft close-fitting ruff.

[1][2]Hofstede de Groot agreed with Moes on the identification of the pendant of this painting depicting Tjarck's wife Maria Larp, which today is in the collection of the National Gallery of London: