According to the 2021 Australian Census, Beaumaris recorded a population of 13,947, with a slightly higher proportion of females (52%) than males (48%). Aboriginal and Torres Strait Islander people made up a small 0.2% of the population. Residents of Beaumaris are generally older than the national average, with a median age of 48 years compared to Australia’s 38. Approximately 25.5% of the population were aged 0–19 years, while 29.5% were 60 years and over, reflecting a community that includes both established families and retirees.

Education levels in Beaumaris are high, with 41.5% of residents holding a Bachelor’s degree or higher, compared to the national average of 26.3%. Only 0.1% reported having no formal qualifications. Advanced Diplomas and Diplomas were held by 11.4% of residents, and secondary education attendance showed a higher proportion in independent schools (18%) compared to government schools (13.3%).

The suburb is predominantly English-speaking, with 86.9% of residents speaking only English at home. While 26.4% of residents were born overseas—below the national average of 33.1%—the largest groups were from England (7.2%), followed by smaller numbers from China, Italy, Germany, and Greece. Among non-English languages spoken at home, Mandarin (1.7%), Greek (1.6%), Italian (1.4%), and German (0.9%) were the most common.

Beaumaris is an affluent community, with a median weekly household income of $2,626, compared to the national median of $1,746. Median monthly mortgage payments were $3,000, well above the national figure of $1,863. In terms of transport, 42% of employed residents commuted by car, while only 2% used public transport, reflecting the suburb’s car-dependent lifestyle.

Housing in Beaumaris is predominantly family-oriented, with 78.9% of dwellings being separate houses and 79.4% occupied by families. Semi-detached homes accounted for 15.5%, flats and apartments 5.1%, and other dwellings 0.6%.

Religiously, Beaumaris reflects the national trend toward secularism, with 45.3% of residents reporting no religion, higher than the Australian average of 38.4%. Catholic residents accounted for 21.4%, Anglicans 13.7%, and Eastern Orthodox 3.5%.

Overall, Beaumaris is characterized by its established, highly educated population, family-oriented housing, high incomes, and strong English-speaking cultural identity, making it one of Melbourne’s most desirable coastal suburbs.