In the area of dementia diagnosis and assessment of cognitive functioning of elderly culturally and linguistically diverse individuals (CALDI) little is known about cognitive test performance differences between migrants and peers from their country of origin. Although Australia is known for its multicultural society and Greek is one of the most common languages spoken at home, few studies have compared cognitive test performance between migrants to peers from their country of origin. This study investigated whether the long-term migrant group of elderly Greek-Australians (GA) performance on tests of cognition was comparable to demographically similar group of elderly Greek Nationals (GN).