The council has dropped some of its savings plans
Oxfordshire county councillors have voted to cut more than £100m from its budget over five years.
Five hundred posts are under threat as the council attempts to save money due to an expected cut in grants from central government this year.
Council members voted on proposals earlier, which will also include a 2.75% increase in council tax.
The county council said despite cuts of £103.8m from April, another £72m would then be reinvested in services.
Union Unison said it is considering balloting its members for strike action.
But the county council has already dropped plans to make savings of £2.3m from youth services and replaced this with proposals for cuts of up to £350,000 from 2012.
Plans could also see outdoor education centres self-financed or facing closure.
The authority said it had managed to save £40m and another £13m in savings was planned for this financial year.