The new iOS version, iOS 26, is expected to be released in mid-September 2025. Based on Apple's usual schedule, the release will likely coincide shortly after the unveiling of the new iPhone 17 lineup, with the official launch event anticipated around September 9, 2025. The public release of iOS 26 to all supported iPhones, including models back to iPhone 11, is expected around September 15 or 16, 2025.
For context, the previous major iOS version, iOS 17, was released on September 18, 2023.