Health minister David Davis was on hand to help officially open the centre in Forest Street, Bendigo.

Dementia consultant Lynne Horsfall said the day went well.

"We had a huge amount of people here," she said.

"There were lots of service providers and the carers who spoke eloquently and from the heart."

There are about 75,000 people with dementia in Victoria.

The hub's opening coincides with the Victorian government's launch of the Victorian Dementia Action Plan.

The plan promotes the health and well-being of Victorians and aims to minimise the risk of getting dementia and supports the independence, heal and well-being of those who have dementia.

"The plan enables Victorians concerned about memory loss to get timely assessment and diagnosis," Mr Davis said.

"It seeks to meet the very diverse needs of our population by delivering support and services to people from diverse cultural and linguistic backgrounds."

Alzheimer's Australia Vic executive officer Maree McCabe said the hub's opening was a significant and much-needed increase in dementia services.

"Our research estimates in the Loddon Mallee region alone there are more than 5200 people currently living with dementia," she said.