On the left side menu, under “Network & Security”, click “Elastic IPs”. On the main screen, click “Allocate New Address”.
In the pop-up window, select “Yes, Allocate”
Select the Elastic IP, click the “Actions” menu drop down, and select “Associate Address”.
Next to “Instance”, type in the name of your EC2 server or it’s instance ID. Then select the instance search result for the EC2 server that you’ll be assigning the IP to. Then click the “Associate” button.
You will now see an Elastic IP assigned to your EC2 server.