On Windows, hold Alt and type 164 for ñ or 165 for Ñ using the numeric keypad
On Mac, press Option + n, then type n for ñ or Shift + Option + n, then type N for Ñ
On iPhone or iPad, press and hold n, then select ñ
On Android, press and hold n, then select ñ
On a Spanish keyboard, press the dedicated ñ key
In Microsoft Word, type 00F1 and press Alt + X for ñ
In Microsoft Word, type 00D1 and press Alt + X for Ñ