Mordialloc, a bayside residential suburb, is 25 km south-east of central Melbourne. The name's antecedents are a squatting run ‘Moodi Yallo’ (1837), a census taken in 1841 at ‘Moode Yallock’ and Georgiana McCrae's visit to ‘Mordy Yallock’ in 1844. The name is thought to be derived from Aboriginal words meaning (1) creek named Moodi or Marida or (2) meaning ‘near little sea’ or ‘small tidal stream’. The Mordialloc Creek is both tidal and of more than usual width where it enters the bay. In the nineteenth century a sandbar often made the creek mouth a shallow inlet.

In the 1860s the land along the coast backing on to the Carrum Swamp, southwards from Mordialloc, was divided into large allotments and sold. A Crown Lands map (1863) showed building allotments marked out west of Chute Street, but to the east the land was labelled flood-prone with the Carrum Swamp touching today’s Browns Reserve. The owner of the allotment adjoining the Mordialloc Creek built the Bridge Hotel there in 1868, positioned on the coastal track to Frankston. For some years before, Mordialloc had been a point of supply of fish for Melbourne, including fish caught at Hastings and carried on the old fish track across the Mornington Peninsula. A primary school was opened in 1868 along with the adjacent Anglican church (1874) and Presbyterian church (1884). In 1875 the Australian handbook described Mordialloc:

During the late 1870s plans for the defence of Melbourne and Port Phillip Bay included the building of railways around the coast. Extension of the railway from Caulfield to Mordialloc followed in 1881. Mordialloc also became the site of horse-riding activities – the Melbourne Hunt Club, the Findon Harriers (from Mill Park) and the Epsom Racecourse (1889) on the flood-prone land east of Chute Street. The creek was a popular boating venue, and the foreshore a regular destination for picnics. A Mordialloc Carnival Committee later managed the foreshore attractions. The Australian handbook of 1903 described the enlargement of Mordialloc's institutions and attractions:

The builder of the Epsom Racecourse also owned the adjoining Mayfield estate on which the Mordialloc (later Woodlands) golf course was formed in 1913.

On 26 May 1920, the Mentone and Mordialloc borough was created by severance from the Moorabbin shire, the borough having a population of about 5700 persons. It became Mordialloc town on 24 April 1923 and a city on 5 May 1926. The municipality included a small part of Beaumaris in the west and ended at Mordialloc Creek, an area of 13.6 sq km.

In 1929 the Mordialloc-Carrum (later Mordialloc-Chelsea) high school was opened. During the 1930s and 1940s Mordialloc municipality underwent expansion, and by the early postwar years Mentone and Parkdale were rapidly growing areas. The municipality was described in the Australian blue book in 1946:

Mordialloc suburb at the southern end of the municipality, on the Mordialloc Creek, has foreshore and watercourse reserves, along with others adjoining the former Epsom Training Track. The training track closed in 1998 and the land turned over to new housing in the early 2000s. The shopping centre is between the foreshore and the railway station. It comprises the Main Street shopping strip and a drive-in plaza of 11 shops including a supermarket (1985). The State primary school and the Catholic primary school (1911) are within walking distance of the shops. The beach remains popular with lifesaving and picnic facilities. The pier and the Mordialloc Sailing Club are near the mouth of the Mordialloc Creek.

Mordialloc Creek is a distributary waterway, branching from the Dandenong Creek in Bangholme. Before the digging of the Patterson River drain in 1879 Its waters came from the Carrum Swamp. It was regularly flushed and was popular for swimming, boating and fishing. The Mordialloc Motor Yacht Club (1925) and the Sea Scouts and Guides have club rooms near Beach Road. Jack Pompei’s boat yard is a few hundred metres upstream. Bad floods in 1934 brought about an artificial blockage of the creek, causing silting and pollution, and only the tidal entrance had acceptable water quality. The creek was dredged in 2012.

Mordialloc's early housing is mainly modest brick veneer, with bigger houses along Beach Road overlooking the beach and the bay. Over 400 dwellings were built during 2001-06, mostly on the former Epsom Training Track. Two hundred were flats and apartments. At the 2011 census, a little over half of Mordialloc’s dwellings were row houses, flats and units.

On 15 December 1994, all of Mordialloc city except a part in the west which is in Beaumaris was united with Chelsea city and parts of Moorabbin, Oakleigh and Springvale cities to form Kingston city. Census populations were:

census date population
  Mordialloc Mordialloc municipality
1871 134  
1881 328  
1891 681  
1901 623  
1911 1434  
1933   9216
1947   14,513
1954   21,025
1961   26,526
1971   29,753
1981   28,900
1991   26,325
2001 5577  
2006 6982  
2011 7537  

Further Reading

Frank McGuire, Mordialloc – the early days, The Mordialloc Community Service Committee, 1985

Tom Sheehy, Mordialloc-Chelsea: aspects of history, Standard Newspapers of Cheltenham, 1970

Tom Sheehy, A shire preceded three cities: Moorabbin, Sandringham, Mordialloc, Cheltenham, 1965

Veronica Hahn and John Macnaughton, Epsom at Mordialloc: from racing to training 1889-1998, Mordialloc, 2003

Mentone and Parkdale entries