The division is located in the outer eastern suburbs of Melbourne and extends into the Yarra Valley and Dandenong Ranges.

Major suburbs and towns include Belgrave, Belgrave Heights, Belgrave South, Chirnside Park, Coldstream, Dixons Creek, Don Valley, Ferny Creek, Gladysdale, Gruyere, Healesville, Hoddles Creek, Kallista, Kalorama, Kilsyth, Kilsyth South, Launching Place, Lilydale, Lysterfield, Menzies Creek, Millgrove, Monbulk, Montrose, Mooroolbark, Mount Evelyn, Mount Dandenong, Olinda, Powelltown, Reefton, Sassafras, Selby, Seville, Seville East, Silvan, Tecoma, Upwey, Wandin, Wandin East, Warburton, Wesburn, Woori Yallock, Yarra Glen, and Yellingbo.

His immediate predecessor is Tony Smith, who was Speaker of the House from 2015 through 2021, and was, after Bob Halverson, the second member for this electorate to occupy the chair.

Demographic changes have also contributed in making Casey a fairly safe seat for the Liberal Party, although a redistribution ahead of the 2013 federal election pushed the seat further north into the upper Yarra Valley, estimated to halve the Liberal two-party preferred majority of 4.2 per cent.

Prominent members to have represented Casey include Peter Howson, who served as a minister in the McMahon government; Bob Halverson, who was Speaker of the House of Representatives 1996–98; Michael Wooldridge, who served as Minister for Health in the first five years of the Howard government (1996–2001); and Tony Smith, Speaker from 2015 until 2021.