Willen Park and Downhead Park are the latest estates to be added to Starship's service area.
This is part of Starship's expansion of the service in Milton Keynes North. Yesterday, Conniburrow and Downs Barn were also added.
The robots will be delivering groceries to residents from the Co-op in Great Linford.
People can download the Starship app to make an order, select their delivery location and the robots will deliver the groceries to them in around an hour.
NHS workers also currently qualify for free delivery on the app.
It was also announced last week that residents in Bletchley and Shenley Church End can now receive Starship deliveries.
Starship robots already cover several estates including Broughton, Middleton, Monkston, Kents Hill, Walnut Tree, Furzton, Shenley Brook End, Shenley Lodge, Furzton, Emerson Valley, Tattenhoe and the City Centre.