Nancy Blachman (born 1956 in Palo Alto, CA) is an American educator, supporter of recreational mathematics and mathematical outreach, software book author, and supporter of indie documentary films. In 2007, she founded the Julia Robinson Mathematics Festival (JRMF), which has grown into a successful math enrichment enterprise for teenagers in the USA and beyond. She is a former chair of Gathering 4 Gardner and is still an active board member. She is currently Chair of the Advisory Board of Berkeley’s Industrial Engineering and Operations Research Department (IEOR).