Here is a link that I found for Maryland, assuming that is where you are considering.
If you scroll down, you will notice the job description and requirements for becoming a Game Warden. Further down the page you will find various salaries based on level of experience and responsibility.
I have teased that portion out those salaries below (please note this changes from state to state and annually as well):
Maryland Wildlife Officer Salary: The Maryland Workforce Exchange provides a detailed salary schedule for the natural resources police officers of the Department of Natural Resources. A natural resources police officer candidate earns a base salary of $35,000.
Following training, these professionals earn the following salaries:
Officer I: $48,099-$86,697
Officer 1st Class: $51,467-$92,765
Senior Officer: $52,496-$94,620
Master Officer: $53,545-$96,510