Daniel J. O'Donnell is an American politician from the state of New York. A Democrat, he is a member of the New York State Assembly. O'Donnell represents the 69th district in Manhattan, made up of the neighborhoods of Manhattan Valley, Morningside Heights, and portions of the Upper West Side and West Harlem.

The New York State Assembly is the lower house of the New York State Legislature, with the New York State Senate being the upper house. There are 150 seats in the Assembly. Assembly members serve two-year terms without term limits.