Protests are expected at Oxfordshire County Council as its budget is finalised later.
The Conservative-run authority has to save £69m after a cut in government funding.
David Cameron's mother and aunt are among those who have expressed concerns about the level of cuts.
The new budget will see the scrapping of mobile libraries and bus subsidiaries, funding for the arts, homeless support, road gritting and elderly day services and support for carers.
Meanwhile the Unite union is staging a 24-hour walk-out over plans to shut 44 children's centres in the county.