Ludvig Nessa (born 11 December 1949), cand. theol., is a Norwegian priest who has been a strong opponent against legalised abortion in Norway since the 1980s, often together with priest Børre Knudsen.
Nessa was excommunicated from Den norske kirke, despite an appeal at Eidsivating Court of Appeal on 18 March 1991, and later moved to Strandebarm prosti with Knudsen and others.
Nessa has also been a staunch opponent of Islam since the 2000s.