First responders took 36-year-old Kyle Strube to the hospital via helicopter after an accident Monday morning near Anamosa.
Authorities say Strube was driving a motorcycle southbound on X28 near 110th Street when they hit a deer.
The impact threw Strube from his motorcycle.
The air ambulance took Strube to St. Luke's Hospital.
The Jones County Sheriff's Office, Anamosa Ambulance, Anamosa Fire and Lifeguard assisted at the scene.