Random-digit dialing surveys were conducted before (n = 1543) and 8 to 9 months after (n = 1430) implementation of the city of Toronto workplace smoking bylaw. Compared with workers in the rest of metropolitan Toronto and persons not working outside the home, city workers evidenced more positive changes in regard to knowledge of the bylaw, its requirements, and enforcement provisions. City workers reported more changes in workplace restrictions and satisfaction with such restrictions. Patterns of smoking at work changed.