a ^ Northern Territory Senator Nigel Scullion sits as the sole representative of the Country Liberal Party, the local equivalent of both the National and Liberal parties. He sits in the National party room, and serves as the National Party deputy leader in the Senate.
b ^ There is no separate LNP party room. Senators Brandis, Mason, McGrath and Macdonald sit in the Liberal party room. Senators Canavan and O'Sullivan sit in the National Party room.
c ^ Victorian Senator John Madigan resigned from the DLP on 4 September 2014 and sat thereafter as an independent.
d ^ Tasmanian Senator Jacqui Lambie resigned from the Palmer United Party on 24 November 2014 and sat thereafter as an independent.
e ^ New South Wales Senator John Faulkner resigned from the Senate on 6 February 2015.
f ^ Queensland Senator Glenn Lazarus resigned from the Palmer United Party on 13 March 2015 and sat thereafter as an independent.
g ^ Australian Capital Territory Labor Senator Kate Lundy resigned from the Senate on 24 March 2015. Former ACT Chief Minister Katy Gallagher was appointed as her replacement on 25 March 2015.
h ^ Queensland LNP Senator Brett Mason resigned from the Senate on 26 March 2015.