According to the California Secretary of State, as of February 10, 2019, Nevada County has 78,736 registered voters. Of those, 24,677 (36%) are registered Democrats, 22,252 (32.3%) are registered Republicans, 9,426 (13.76%) are registered to another party and 7,845 (11.5%) have declined to state a political party. In both 2000 and 2004, George W. Bush won a majority of the votes in the county. In 2008, Barack Obama carried the county with a 51.5%–46.2% margin. 2008 marked the first time Nevada County went for a Democrat since Lyndon Johnson in 1964. In 2012, Obama lost by a narrow margin to Mitt Romney, turning the county red once again, only for Hillary Clinton to win it back in 2016 over Donald Trump. Joe Biden won the county in 2020, continuing its Democratic shift.