Some 450 posts could be cut at Cambridgeshire County Council in the next year in a bid to save £161m over the next five years.
Services for children and vulnerable adults face funding cuts under plans unveiled by the council.
The savings include a cut of £1m from disability services for children, £500,000 from specialist teaching and £600,000 from children's centres.
There will be a £3m reduction in school transport.
The social care budget will also be cut by £950,000.
The council is looking to save nearly £10m by changing the way it delivers adult social care.
Bus subsidies will be phased out, saving £2.7m, and £1m will be invested in community transport schemes in a bid to make up the gap.
Most of the job losses, about 240, will come from children's services.
About £3m will be cut from backroom services such as the information technology department.
The council has said its cuts will mean there is no increase in the county council's element of council tax in the next financial year, and probably no increase for a further four years.
John Reynolds, cabinet member for resources and performance, said the council would become "leaner in terms of what it directly provides and the numbers of employees it needs to deliver services".
"There is no escaping the fact that there will be cuts to services. Cambridgeshire was already a lean authority and that has made for difficult decisions," he said.