If your iPad is working properly:
- Navigate to Settings -> General -> About
- The Serial Number is listed towards the bottom of the page, along with other information.
If your iPad will not turn on or boot properly:
- Your serial number is printed on the back of your iPad.
If you do not see iPad label:
- Run iTunes on your computer
- Plugin your iPad to your computer.
- iPad serial number (S/N) will appear in the iTunes information.