Yes, Disneyland Paris enforces a "Family-Friendly" dress code in 2026. At a minimum, you must wear footwear, a top, and a bottom at all times. Clothing with offensive language, graphic violence, or obscene imagery is strictly prohibited and can result in denied entry. A supportive 2026 reality: while the parks are casual, costumes for guests aged 14 and older are generally prohibited during regular hours to prevent confusion between guests and official "Cast Members." However, this rule is relaxed during special events like the Halloween Party. For fine dining locations like Manhattan Restaurant or Yacht Club, a "smart casual" look is encouraged, though not strictly enforced with the same rigor as a Parisian bistro. It’s also vital to dress for the weather—Paris can be quite chilly and rainy in 2026, so layers and waterproof gear are more "fashionable" for a successful day than high-end luxury wear.