How do I locate lost iPad?

Click here for information; in addition, post notices around where it got lost, and if applicable, contact the Lost & Found department of the facility involved.

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Start here:

Locate a device in Find My on iPad - Apple Support

Here is Apple’s advice for lost or stolen devices:

If your iPhone, iPad or iPod touch is lost or stolen – Apple Support

Use the Find My app to locate a lost or stolen device – Apple Support

If the Find My iPad feature was enabled prior to it being “misplaced”, then if active, you would stand a good chance of locating it. 

However, if the feature was not activated prior to being misplaced - or the iPad has been inactive or without a network connection for more than 24 hours, the last known location will not be available - and the opportunity to use technical means to recover the iPad may have been lost.