Thousands of Queensland public servants say their departments have become less efficient in the wake of the state government's decision to downsize the public sector.

A study found 34.8 per cent of state education staff believed their workplace was functioning less efficiently as a result of changes in the previous 12 months.

Government departments have become less efficient in the wake of job cuts, workers say.

The results were even worse for the Department of Transport and Main Roads (52.9 per cent), Department of Community Safety (52.7 per cent), police (40.9 per cent), along with the state health department (49 per cent) and numerous hospital health services.

The figures were published this month in the Queensland Employee Opinion Survey conducted by ORC International and commissioned by the Queensland government.