Cuomo, an incumbent from New Castle, already faces a Democratic challenge from Cynthia Nixon of Manhattan, an education activist best known for her acting on television's "Sex and the City."
According to multiple news reports, Miner became a frequent critic of Cuomo's policies about five years ago.
“I cannot be a silent witness to what I think is a corrupt political culture that is hurting real people every day,” Miner said in this New York Times interview announcing her third-party candidacy.
Cuomo is running for a third four-year term. The Republican Party candidate is Dutchess County Executive Marc Molinaro.
Several public opinion polls, including this recent one reported by Daily Voice, have found Cuomo enjoying comfortable early leads over Nixon and Molinaro.
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