A good place to find high school wrestling rankings is Wrestling USA, which looks at rankings across the nation. There are also location-specific websites with rankings, such as CalGrappler.com, a website that publishes rankings for California high schools and colleges.
Wrestling USA separates its rankings into categories. For example, there are categories for different regions of the United States and for different years. For each year, the website lists rankings for the best seniors, best juniors, best sophomores and freshman, and best all-class rankings.
CalGrapple.com includes rankings for California high school and college wrestlers. It publishes state rankings, section rankings, fan rankings and class rankings.