If you are on a later iOS version after iOS 11, please refer to this guide to set up Yahoo mail account on iPhone.
Add Yahoo Mail to iPad
Tap to open the Settings app on your iPad home screen. If you’re using iOS 10.3.3 or earlier, locate and tap on Mail, Contacts, Calendars from the left menu. You will see a screen like below.
If your iPhone or iPad is running on iOS 11 or later, go to Settings >> Accounts & Passwords.
From above screenshot, you can see all existing email accounts on iPad listed under the Accounts section and there is a Add Account option below them. To add new email accounts to iPad, choose this Add Account menu item. You will be taken to a new screen on iPad like this.
This screen displays the major email types and services on iPad. The iPad we are using for this demo is running on iOS 7, if you are using an earlier iOS version, like iOS 5, iOS 6, or a later version iOS 8, you may see it differs in appearance. But most likely Yahoo mail is included in this default email option list on iPad. To add Yahoo mail to iPad, select Yahoo! option from above screen. You will then be prompted to type in your Yahoo account credentials, like email address, email password, etc. See below figure.
Note that you have to input the full Yahoo email address, including the @yahoo.com part, or else like @yahoo.hk if you are using Yahoo Hong Kong email service. The Name and Description fields do not have to be something unique, simply type in something descriptive, such as My Yahoo Mail. Tap on the Next button on the top right corner to proceed.
Authentication failed? See this Yahoo mail incorrect password error when setting up on iPhone and troubleshooting.
Here you have the chance to sync Yahoo mail contacts to iPad. By default the Mail app disables the contacts option, so if you skip this step and tap on the Save directly, you cann’t add Yahoo email contacts to iPad. You need to manually turn it on in order to transfer Yahoo mail contacts to iPad along with other sync options like emails, calendars, reminders, notes.
If you choose to import contacts from Yahoo mail to iPad, you will be required to choose how do you like to do with existing local contacts on iPad? Keep iPad local contacts or delete them? Under most circumstances, you may need to keep existing iPad contacts intact.
If you can’t sync contacts from Yahoo account to iPad, see this troubleshooting: how to sync Yahoo mail contacts to iPad?
Now you have all sync options enabled, mail, contacts, calendars, reminders, notes. You will be able to sync all of them from Yahoo mail server to your iPad. Tap on the Save button on the top right corner, all Yahoo email account will be saved on iPad. Now you can go to Mail app on iPad to check and manage your Yahoo emails.
Setup Yahoo Mail Account on iPad – Youtube Video Guide
Update Jan 2018: this article was originally published in 2014. In this update, we added the iPhone settings screenshot to reflect the change of iOS 11.