Olive Garden ranked among the top chain restaurants in the US.Sarah Schmalbruch/Business InsiderTechnomic data analyzed by Nation's Restaurant News ranks the top 15 US chain restaurants.Olive Garden, Texas Roadhouse, and Applebee's lead in casual-dining chain restaurants.Waffle House has the most restaurants on this ranking with 1,985 locations.While fast-food and fast-casual chains dominate the industry, many casual-dining and family-style chain restaurants are also thriving.This year, there have been challenges — Red Lobster's recent bankruptcy filing sent shockwaves through the industry — and opportunities for chain restaurants, which are now competing with fast-food chains for value-driven customers.From Olive Garden to Denny's, you've likely visited at least one of these chains in the past year.