Hendricus (Henricus) Jansen (The Hague, January 2, 1867 – Rotterdam, February 5, 1921) was a Dutch graphic artist, lithographer, illustrator, painter, draftsman, designer, pastelist, wall painter, glass painter and etcher. He trained at the Academy of Visual Arts in The Hague. As an artist he worked under the name Henricus.

He worked in The Hague, Liège, Paris, Normandy, Brittany, Rhenen, Voorburg, Renkum, Leiden, Heeze and Rotterdam.

His production consisted of portraits, cityscapes, oriental scenes, figure representations, religion, book decorations, while he is also known to have a cover drawing for sheet music. He painted many oriental cities, mostly Arab streets, in bright colors and with strong light and shadow areas. There are also known glass paintings by him.

A special work is a portfolio with 27 lithographs: Dat Liedekin by Heere Halewine published by De Erven F. Bohn, Haarlem in 1904 and printed by N.V. Lith. v/h S. Lankhout & Co. in The Hague. In the series The Applied Arts in the Netherlands, The illumination of the book by G.H. Pannekoek Jr., published by W.L.& J. Brusse, Rotterdam, 1927, Pannekoek writes on p. 36: I still remember the impression the prints made everywhere when they were exhibited in the Haagsche Kunstkring in 1903. As far as can be determined, this is the only time that the 27 lithographs have been shown in full. Henricus worked on this colossal book for two full years. Between 1893 and 1906 he made cartoons for the Nederlandsche Spectator and images for Elseviers Maandblad.

In the Royal Theater in The Hague there is an oval ceiling in one room with a painting by Henricus Jansen, while in the same city a number of Art Nouveau scenes hang in Restaurant and Lounge Henricus - named after him - in Sophialaan. Jansen also staged shadow plays and made the costume designs for a student performance of Lorenzo de Medici on the occasion of the 12th anniversary of the Delft Student Corps in 1908. Henricus also took the illustrations for the commemorative edition of this piece, with a prose text by P.C. Boutens, on his behalf.