|Population||8,166 (2016 census)|
|• Density||1,856/km2 (4,810/sq mi)|
|Area||4.4 km2 (1.7 sq mi)|
|Location||24 km (15 mi) from Melbourne|
|LGA(s)||City of Kingston|
Mordialloc is a beachside suburb in Melbourne, Victoria, Australia, 24 km south-east of Melbourne's central business district. Its local government area is the City of Kingston. At the 2016 census, Mordialloc had a population of 8,166.
The name is derived from the term moordy yallock which originated from the Aboriginal language Boonwurrung, which is listed in some sources as meaning muddy creek, and in others as "little sea."
Mordialloc Post Office opened on 17 October 1863. In 1995 it was renamed Braeside Business Centre, and a new Mordialloc office opened near the railway station.
Mordialloc Creek is arguably the most significant feature of the suburb. Home to Pompei's boat works, Mordialloc Creek has a rich history of traditional wooden boat building. Many classic boats line the banks of the creek.
- Mordialloc College - Mordialloc
- Mordialloc Beach Primary School - Mordialloc
- St Brigids Mordialloc 
Golfers play at the course of the Woodlands Golf Club on White Street, Mordialloc.
The Epsom Park Horse Racing track was situated in Mordialloc. Now a housing estate, in its heyday at the beginning of the 20th century it was one of Victoria's premier race tracks. Later in life it became a training track before being eventually closed in the 1980s. In 2008, Doug Denyer Reserve, situated in Epsom Park hosted it first ever cricket season with Mordialloc Redbacks being the home team, Redbacks being a part of the Mordialloc Cricket Club. The Redbacks first Junior Head Coach at Epsom Park was David Beckett.
The suburb has a social baseball team, the Mordialloc Ducks Baseball Club, competing in the Dandenong Baseball Association in winter and the Victorian Baseball Summer League in summer. They play at the Kingston Heath Reserve in Cheltenham, where the grounds are primarily used by the Cheltenham Baseball Club.
There are numerous walking/cycling trails in Mordialloc, including the:
- Long Beach Trail from the Patterson River to the Mordialloc Pier.
- Bay Trail from Seaford to Port Melbourne.
- Mordialloc Creek Trail from the Mordialloc Pier to Aspendale Gardens.
- Numerous 'desire paths' (or goat tracks) that run next to the Mordialloc Creek between the Wells Road bridge and the Boat Ramp near Chute Street.
- "Smacka" Fitzgibbon, entertainer
- Mary Hannay Foott, author
- Julius Herz, musician
- Jack Holt, a horse trainer known as the “Wizard of Mordialloc”
- Cecilia John, singer and social activist
- Daniel Mackinnon, pastoralist
- George Furner Langley, soldier and teacher
- Rex Mortimer, solicitor and academic
- Sir Murray Tyrrell, public servant
- Bill Williamson, jockey
- Tommy Woodcock, horse trainer
- George Hanlon, horse trainer
Clarice Beckett - Mordialloc Pier (The Petrol Pump)
- Australian Bureau of Statistics (27 June 2017). "Mordialloc (State Suburb)". 2016 Census QuickStats. Retrieved 3 December 2017.
- Blake, Les (1977), Place names of Victoria, Adelaide: Rigby, p. 294, ISBN 0-7270-0250-3, cited in Bird (2006)
- Bird, Eric (12 October 2006). "Place Names on the Coast of Victoria" (PDF). The Australian National Placename Survey (ANPS). Archived from the original (PDF) on 18 February 2011.
- Premier Postal History, Post Office List, retrieved 11 April 2008
- Burgmann, Verity and Meredith (1998). Green Bans, Red Union: Environmental Activism and the New South Wales Builders Labourers' Federation. p. 50.
- "Jack Pompei: Boat Builder and Advocate for Mordialloc Creek". Copyright © 1998-2006 City of Kingston Historical Website. Retrieved 9 February 2015.
- "Mordialloc College". mcsc.vic.edu.au. Archived from the original on 25 August 2007.
- "Mordialloc Beach Primary School". Mordialloc Beach Primary School.
- "St Brigid's School - Mordialloc". catholic.edu.au.
- Full Point Footy, Southern Football League, archived from the original on 1 January 2009, retrieved 21 October 2008
- Golf Select, Woodlands, retrieved 11 May 2009
- "Mordialloc Ducks Baseball Club – Baseball Meets Fun". Retrieved 19 February 2021.
- Julius Herz, ADB
- Daniel Mckinnon, ADB