Ashtonfield is a suburb in the City of Maitland, New South Wales, Australia.

According to the 2016 census of Population, there were 4,645 people in Ashtonfield.

• Aboriginal and Torres Strait Islander people made up 3.1% of the population.
• 84.5% of people were born in Australia and 88.1% of people only spoke English at home.
• The most common responses for religion were Anglican 24.7%, Catholic 24.0% and No Religion 22.7%.

Ashtonfield Public School is a government primary school which opened in 2007 on Norfolk Street.

Stockland Green Hills is a shopping centre in the neighbouring suburb of East Maitland.

Bloomfield Colliery is an open cut mine operating in Ashtonfield.