List of premiers of New South Wales by time in office

This is a list of premiers of New South Wales by time in office. The basis of the list is the inclusive number of days between dates.

Total time in office of Australian political parties
New South Wales Parliament – 8945 days days as of 29 July 2024
 * Before Parties – days
 * Liberalism – days

Since 7 October 1885
 * Labor Party –  days as of 29 July 2024
 * Liberal Party –  days
 * Protectionist Party – days
 * Progressive Party – days
 * Liberal Reform Party – days
 * Liberal Reform Party – days
 * Liberalism (Non Party) – days