Is my iPad 4th generation compatible with iOS 11?

The iPad 4th generation doesn't support IOS 11 because it has the A6X chip, This is a 32 BIT device and apple no longer supports 32 Bit devices

Devices with the 64 Bit A7 chip will support IOS 11 including:

- iPhone 5s later

- iPad Air later

- iPad mini 2 Later

- All iPad pro's

- iPod touch 6th generation

Personally I would upgrade if you really want to have IOS 11 but if your not interested you'll be fine

The iPad 4th generation is ineligible and excluded from upgrading to iOS 11

With the introduction of iOS 11, ALL support for older 32 bit iDevices and any iOS 32 bit apps has ended.

Your iPad 4 is a 32 bit hardware device.

The new 64 bit coded iOS 11 ONLY supports newer 64 bit hardware iDevices and 64 bit software, now.

The iPad 4 is incompatible with this new iOS, now.

No need to panic or worry though.

Your iPad 4th gen will still work and function as it always has, but will no longer receive any more app updates sometime after the Fall of 2017.

The 4th gen iPad has had over 5 years of iOS upgrades/updates

The final app updates your 4th gen iPad will receive will be its last!

Apple is in the process of weeding out ALL orphaned/non-updated, 32-bit applications.

Currently, your iPad 4th gen is STILL receiving app updates. Look for this to end some time soon.

Your iPad 4 will survive and stay a viable, functioning iPad for a couple of more years to come.

This is why Apple introduced the new, lower cost 2017 iPad 5 model, in April

Apple is trying to get older iPad 2, 3, 4 and 1st gen Mini iPad users to upgrade to more modern iPad hardware in anticipation of iOS 11, which will render all older 32 bit iDevices obsolete.

Good Luck to You!