How can we find Organization ID in Salesforce?

1. Login to Salesforce

2. Click on the Gear Icon- Then Click on Setup 

3. In the New Window- On the left-hand side, In the Quick Find, Search "Company Information"

4. Click on- Company Information

5.  On the Right-Hand Side- In front of Salesforce.com Organization ID header, you can locate your Unique Salesforce Organization ID