Jim Simons (1938–2024) was an American mathematician and hedge fund manager.

Jim, Jimmy, or James Simons may also refer to:

• James Simons (politician) who served as Speaker of the South Carolina House of Representatives
• James Simons Jr. who served as Speaker of the South Carolina House of Representatives
• Jim Simons (golfer) (1950–2005), American golfer
• Jimmy Simons (born 1970), Dutch footballer
• Jimmy Simons, co-winner of 2001 Primetime Emmy Award for Outstanding Comedy Series

• James Simmons (disambiguation)
• James Simon (disambiguation)

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