Morrisons employees will transfer to Waitrose when contracts are completed in September and October.
A Morrisons spokesman said the sale was part of the 'ongoing estate management plan to maximise shareholder value'.
The stores, valued at£53.89 million in total, are located in Eastbourne, Formby, Hexham, Lymington, Poole and Southampton.
The distribution centre in Aylesford, Kent - worth£29.97 million - is non-operational at present.
The sales are conditional on landlord approval at three sites.