Nels Nelson may refer to:
Nels C. Nelson (1875–1964), Danish-American archaeologist Nels Nelson (politician) (1917–1992), Canadian Member of Parliament Nels Nelsen (1894–1943), Norwegian–Canadian ski jumper Nels David Nelson (1918–2003), American mathematician and logician Nels H. Nelson (1903–1973), United States Marine Corps general