Riverdale High School (RHS) is a public four-year high school located at 9622 256th Street North in Port Byron, a village in Rock Island County, Illinois, in the Midwestern United States.

The school is a short commute to the Quad Cities and part of the Davenport-Moline-Rock Island, Iowa-metropolitan statistical area.

fully recognized by the state for making yearly progress and remaining in compliance with testing and standards.

In 2009, the faculty was 76 teachers, averaging 16.9 years of experience, of whom 27% held an advanced degree.

In 1920, the building's upper floors were declared unsafe and classes were moved to the Methodist Church in Cordova.

This grade school building was purchased and used as a restaurant known as the "Cordova Landing" for many years.

The Village of Cordova eventually took possession of the building and had it torn down early in spring 2006.

The children of Hillsdale now attend high school in a building on the outskirts of nearby Port Byron.

The Port Byron High School Building is still standing, used now as a business called Commercial Towel Service.

determined to be structurally sound and a prime property for lofts overlooking the Mississippi River.