Up to 150,000 council staff in Scotland staged the second 24-hour strike over pay in two months.
Schools, ferry services and rubbish collections are being disrupted as members of the Unite, Unison and GMB unions take part in the action.
It comes after the rejection of an amended offer from local authority umbrella group Cosla to change the 2.5% pay offer from three years to one year.
The unions are calling for a 5% increase in line with inflation.
Matt Smith, Unison's Scottish secretary, said he was impressed by the turnout for the strike and threatened more industrial action if the dispute continued.
Members of the Socialist Party participated in this walk out, just as ordinary workers who are union members.We reject any notions of wage increases 'ever' being the cause of inflation.Wages always play 'catch-up' with inflation.