Nicolaas Wilhelm Jungmann was an Anglo-Dutch painter of landscapes and figural subjects, a book-illustrator and decorator.

Jungmann was born in Amsterdam, where he was apprenticed to a church painter, and studied at the Rijksakademie. He came to London around 1893 on a scholarship and became a naturalised British subject, returning to the Netherlands frequently, to paint in Volendam. In 1900, Jungmann married Beatrix Mackay with whom he had three children, Loyd, Zita (1903-2006) and Teresa (nicknamed "Baby") (1907-2010). As a naturalised Briton, he was interned by German forces in the Ruhleben internment camp during the First World War, which led eventually to the dissolution of his marriage. Jungmann made several painting excursions to Brittany and Holland with his friend and fellow-painter Charles W. Bartlett. He illustrated topographical books on Holland (1904) and Norway (1905) for which his wife Beatrix wrote the text, as well as one on Normandy (1905) with a text by Geraldine Edith Mitton. He died, aged 63, in London.