Cornubia is a suburb in the City of Logan, Queensland, Australia. In the 2021 census, Cornubia had a population of 7,810 people.

Cornubia was originally named Cornubia Park, getting its name from the property's owners in the 1920s, during this time, it was a large farm, with timber getting, dairying, crops of corn, oats and barley being the main activities carried out. In September 1934, the land was purchased by the Jessens, and they changed the name of the property to Cornubia. The land was sold again in 1956 and was subdivided into smaller lots. By the early 1980's residential development was apparent.

Cornubia was named as a bounded locality by Queensland Place Names Board on 1 May 1975. Cornubia is the Latin name for Cornwall.

St Matthew's Catholic Primary School opened on 23 January 1984 with 57 students in Years 1 through 3 with the support of the Sisters of St Joseph of the Sacred Heart in the tradition of Mary McKillop.

Chisholm Catholic College opened in 1992.

In the 2011 census, Cornubia had a population of 6,833 people, 49.9% female and 50.1% male. The median age of the Cornubia population was 37 years, the same as the national median. 70.2% of people living in Cornubia were born in Australia. The other top responses for country of birth were England 7%, New Zealand 6.4%, Scotland 1.7%, South Africa 1.5%, Germany 0.7%. 88.9% of people spoke only English at home; the next most common languages were 0.7% Mandarin, 0.6% Afrikaans, 0.5% German, 0.4% Dutch, 0.4% Greek.

In the 2016 census, Cornubia had a population of 7,317 people, 51% female and 49% male. The median age of the Cornubia population was 38 years, on par with the national median of 38. 71.5% of people living in Cornubia were born in Australia. The other top responses for country of birth were England 6.4%, New Zealand 5.7%, South Africa 1.5%, Scotland 1.0%, and Philippines 0.6%. 87.3% of people spoke only English at home, the next most common languages were 0.7% Mandarin, 0.5% Greek, 0.5% Afrikaans, 0.4% German, and 0.4% Spanish.

In the 2021 census, Cornubia recorded a population of 7,810 people, 50.3% female and 49.7% male. The median age of the Cornubia population was 40 years, 2 years above the national median of 38. 73.2% of people living in Cornubia were born in Australia. The other top responses for country of birth were England 6.3%, New Zealand 5.1%, South Africa 1.5%, Scotland 1.0% and India 0.8%. 88.6% of people spoke only English at home, the next most common languages were 0.9% Mandarin, 0.4% Punjabi, 0.4% Afrikaans, 0.4% Spanish, and 0.3% German.