根據2006年人口普查，摩臣湖人口有5，246人。男性佔50.5%，其中62.6%係澳洲出生、83.1%係澳洲公民、0.3%係澳洲原住民。超過45%人口持有學士學位、文憑同埋職業資格。當中22.3％係天主教徒，24.2％無宗教信仰。
According to the 2006 census, Lake Morchen had a population of 5,246 people. Men make up 50.5 per cent, of which 62.6 per cent are Australia born, 83.1 per cent are Australia citizens and 0.3 per cent are Australia Aboriginal people. More than 45% of the population holds bachelor's degrees, diplomas and vocational qualifications. Among them, 22.3% were Catholics and 24.2% had no religious affiliation.