While we don't yet know the new iPhones Apple will be dropping this fall — though there are iPhone 17 rumors — we do know, per Apple's site, that the phones listed below will be compatible with iOS 26. Basically, if you have an iPhone that was announced in 2019 or later, you're in the clear:

Apple announced a big change to how it names its operating systems at WWDC 2025 on Monday . Instead of using system names like iOS 19 and macOS 19, the company will now use the year as part of the name. This means all its operating systems will be called iOS 26, iPadOS 26, macOS 26, tvOS 26, watchOS 26, and visionOS 26.

Apple has unveiled iOS 26, the next version of its iPhone operating system, as part of its suite of announcements at its Worldwide Developers Conference (WWDC). It features a complete redesign with Apple’s new “Liquid Glass” design language.