Teachers, health workers, firefighters and civil servants will join a huge lobby of MPs in the summer to press for what they claim are "decent public services and fair pay for workers".
The event, on June 9, is being supported by 26 trade unions with members in the public sector, ranging from the NHS to central government and the prison service.
A series of pay disputes have flared in recent weeks in the public sector and there have been warnings of problems in local government after a 2.2% pay offer to 1.4 million workers who are seeking a rise of 6%.
TUC general secretary Brendan Barber said: "Across the country, public sector employees are feeling increasingly undervalued and demoralised. Their pay is being held below the cost of living and they feel that public service reform is something done to them, not with them.
"They believe that all their hard work frequently goes unnoticed by politicians and that their contribution to improving public services is often overlooked.
"Last year, the way that pay settlements were handled caused widespread dissatisfaction and dismay amongst public servants.
"The UK's six million public sector employees are hoping for a better deal this year, and that's why a representative segment of the workforce will be in Westminster in June calling for fair pay for everyone in the public sector and for MPs to stand up for public services."
