What is county numbering system on license plates for the state of Indiana?

In Indiana, the county numbering system on license plates assigns a unique two-digit number to each of the state's 92 counties. This number is typically displayed on the left side of the license plate and is used for registration purposes. The numbers are not necessarily in numerical order of the counties but are designated based on various factors, including population and historical context. This system helps identify the county of registration for vehicles in Indiana.