How to find your Salesforce Organization ID
A Salesforce.com Org ID is a sequence of numbers and letters. An Org ID looks like this: 00A6A000002fFTL.
You can retrieve your Salesforce Organization ID (also known as "Org ID") from the Salesforce Setup or RV Setup.
Salesforce Classic Setup
Navigate to Setup - Administer - Company Profile - Company information.
Look up 'Salesforce.com Organization ID' at 'Organization Detail'.
Salesforce Lightning Setup
Navigate to the Salesforce Setup page.
On the left, find and click 'Company Settings' and then click 'Company Information'.
Look up 'Salesforce.com Organization ID'.
RV Setup
Navigate to the RV Setup page.
At 'General Setup', click 'License'.
Find your Organization ID at "Organization ID".