Comment by CCTO on Should I use my supervisor's formal title in a US (Los Angeles) government job?

Mr./Mrs./Miss are very rare in North American workplaces; the exception would be where one party has a title such as Dr or Prof, which is relevant to the workplace. In municipal government, I would likely address the mayor or a councilor by title and surname the first time I met them ("Councilor Smith, thanks for making time for me") but I'd fully expect them to immediately say "Call me Jane" and then to go with that.