Niagara Falls postal workers are off the job today.
The walkout began at 10:00.
Workers at the office on Queen Street by St.Claire Ave rallied outside with signs today.
Rotating walkouts continue across the country today to back contract demands.
Officials with CUP-W say the latest round of rotating job actions will only in effect for the day.
Earlier this week workers in the Toronto area took part in the strike.
CUPW represents delivery agents and other employees of Canada Post.
Its members were lockedout last in 2011-12.
The federal government legislated them back to work, although a judge later ruled that the legislation was unconstitutional.