26733 Nanavisitor is an asteroid discovered on April 22, 2001 by Canadian astronomer William Kwong Yu Yeung. Initially designated 2001 HC16, the asteroid was given its present name by the International Astronomical Union in honor of American actress Nana Visitor, who is best known for playing Kira Nerys on the television series Star Trek: Deep Space Nine.

26733 Nanavisitor is estimated to be 2 to 5 kilometres in size.

An asteroid discovered one day later by Yeung was given the name 26734 Terryfarrell by the IAU in honor of Visitor's DS9 co-star, Terry Farrell.