Diane Black visited the Anne Arundel Community College in Arnold, where she was trained as a nurse until 1971. In 1992, she moved to Belmont University in Nashville in their profession continued and was admitted as a full-time nurse. Later, she also held at Volunteer State Community College in Gallatin lectures on their area of expertise. She worked temporarily for non-profit organizations.
Politically, Black joined the Republican Party. Between 1999 and 2005 she was a Member of the House of Representatives from Tennessee; 2005-2010 she was a member of the State Senate. In the congressional elections of 2010, she was in the sixth constituency of Tennessee with 67 % of the vote to Democrat Brett Carter in the U.S. House of Representatives in Washington DC chosen, where they succeeded the candidates no longer Bart Gordon on January 3, 2011. In Congress, she is a member of the Budget Committee and the Committee on Ways and Means, and in a subcommittee. Within her party she belongs to the Republican Study Committee and as a member of the Tea Party Caucus to the supporters of the Tea Party movement.
She is married to businessman Dave Black, with whom she has three grown children.