Ten cases of COVID-19 have been recorded in Melton according to the Department of Health and Human Services.
A single case has also been recorded in Moorabool.
Elsewhere in the western suburbs, 14 cases have been reported in the municipality of Wyndham, 13 cases in Moonee Valley, 12 cases in Brimbank, seven cases in Hobsons Bay and five cases in Maribyrnong.
A total of 520 cases have been recorded across the state.
The figures come as Victoria recorded its first deaths from the virus, taking the national toll to 12.
Two men aged in their 70s, died in Melbourne hospitals overnight on Wednesday.
Victoria’s chief health officer Brett Sutton today announced a third death, also a man in his 70s.