Yes, you can and absolutely should take sunscreen into Disneyland. The parks have no restrictions on bringing in sunscreen, whether it is in lotion, stick, or aerosol form. In fact, Disney’s 2026 "Park Packing Tips" explicitly list sunscreen as a health and hygiene essential due to the intense California or Florida sun. You are permitted to bring full-sized containers in your backpack, as theme park security is focused on prohibited items like weapons or glass containers (sunscreen is almost always in plastic). For a more efficient day, many guests prefer travel-sized versions or sunscreen sticks for quick "on-the-go" reapplications while waiting in line for outdoor attractions. If you forget to bring your own, you can purchase it at most retail shops inside the parks or at the First Aid stations, though it will be significantly more expensive than buying it at a local pharmacy outside the resort.