It's not clear how large the turnout will be at any given location, or whether the walkouts will be enough to disrupt operations. Similar actions this summer had varying results, with some restaurants unable to serve customers and others seemingly unaffected.
The National Restaurant Association, an industry lobbying group, called the demonstrations a "campaign engineered by national labor groups," and said the vast majority of participants were union protesters rather than workers.
The group said that the demonstrations in the past "have fallen well short of their purported numbers."
Kendall Fells, a New York City-based organizer for Fast Food Forward, said demonstrations are also planned for 100 cities, in addition to the 100 cities where workers will strike. He said plans started coming together shortly after the one-day actions in about 60 cities this summer.
Organizers face an uphill battle in changing an industry that competes aggressively on low prices, a practice that has intensified as companies including McDonald's Corp., Burger King Worldwide Inc. and Yum Brands Inc. face growing competition and slow growth in the weak economy.
Fast-food workers have also been seen as difficult to organize, given the industry's high turnover rates. But the Service Employees International Union, which represents more than 2 million workers in health care, janitorial and other industries, has been providing organizational and financial support to the push for higher pay over the past year.
SEIU President Mary Kay Henry said she thinks the protests have helped encourage more states and localities to raise their minimum wage this year. She expects the number of cities and participants in the protests to grow next year as the union tries to keep pressure on fast food companies.
"I think we've totally changed the conversation about what these jobs are worth," Henry said. "These are no longer jobs being done by teenagers who need extra money. These are jobs being done by adults that can't find any other work."