Michael or Mike Nelson may refer to:
Arts and entertainment
Banners (musician), English musician Michael Nelson performing as Banners
Michael Nelson (novelist) (1921–1990), British novelist
Michael Alan Nelson (born 1971), writer of several comics from Boom! Studios
Michael J. Nelson (born 1964), American writer and performer, best known for work on Mystery Science Theater 3000
Michael James Nelson (born 1979), American comedian, writer and producer
Michael P. Nelson (born 1966), American writer, teacher and academic
Mike Nelson (artist) (born 1967), British installation artist
Politics, government and military
Goodspaceguy (born Michael George Nelson), American perennial candidate
Michael Nelson (political scientist) (born 1949), American political scientist
Michael Chaim Nelson, New York City councilman
Michael R. Nelson, North Carolina politician
Mike Nelson (Minnesota politician) (born 1954), member of the Minnesota House of Representatives
Mike Nelson (Montana politician), mayor of Billings, Montana
Michael A. Nelson (1937–2024), United States Air Force general
Sport
Michael Nelson (footballer) (born 1980), British footballer
Michael Nelson (soccer, born 1994), American soccer player
Michael Nelson (soccer, born 1995), American soccer player
Fictional
Mike Nelson (character), played by Michael J. Nelson on Mystery Science Theater 3000
Mike Nelson (Twin Peaks), a character in the TV series Twin Peaks
Mike Nelson, the lead character (played by Lloyd Bridges) in the TV series Sea Hunt