David Mark (October 7, 1947 – September 24, 2022) was a SUNY Distinguished Professor in the Department of Geography at the University at Buffalo, USA.

He made several contributions to research and education in Geographic Information Science (GIScience), most recently in human spatial cognition and language.

He is credited for a popular water flow routing GIS algorithm, which specifies how to eliminate spurious pits from digital elevation models.

[7] In 1990, David Mark organized with Andrew U. Frank the NATO Advanced Study Institute in Las Navas del Marquez (Spain).

[11] Until his death, he continued to work on most of these topics, with special focus on establishing a foundational ontology of the landscape.