Rosa Parks was in jail for roughly a day. The president of the NAACP Edgar Nixon bailed Rosa Parks out of jail one day after her arrest for refusing to give up her seat to a white man on Dec. 1, 1955. The courts convicted her of disorderly conduct four days after her arrest.
As the test case for the NAACP, Parks' refusal to relinquish her seat set off the Montgomery Bus Boycott that helped lead to the dismantling of segregation laws. Parks went to jail again three months later on Feb. 21, 1956 for violating a state law against organized boycotting. At the time, she was a member of the executive board of directors of the group organizing the Montgomery Bus Boycott.