Find Your Facebook Page ID

First of all , login to your facebook account and open your facebook page that you want to find page ID.
On the left side of your facebook page , move your mouse cursor to "Admin settings".

 

 When you put your mouse cursor to Admin setting . You will see your facebook page ID on the bottom left side of your Facebook page.The number shown after 'id = ' is you Facebook page ID.

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For More Details watch this video