The　fatigue　flexural　behavior　of　corroded　reinforced　concrete　(RC)　beams　was　experimentally　and　analytically　examined.　Seven　beams　were　constructed　and　tested,　and　an　analytical　fatigue　prediction　model　(FPM)　was　proposed　to　assess　the　fatigue　behavior　of　the　corroded　beams.　After　validating　the　FPM　with　the　experimental　test　results,　the　FPM　was　then　extended　to　better　understand　the　effects　of　the　degree　of　steel　corrosion,　the　corrosion　pit　geometry,　and　the　fatigue　load　level　on　the　performance　of　corroded　RC　beams.　The　results　show　that　the　fatigue　behavior　of　the　corroded　steel　bars　determines　the　fatigue　behavior　of　the　beams.　Rebar　corrosion　has　a　significant　detrimental　effect　on　the　fatigue　performance　of　RC　beams　due　to　stress　concentration,　loss　of　steel　cross-sectional　area,　and　diminished　bonding　at　the　steel-concrete　interface.　The　stress　concentrations　increase　with　increasing　pit　width-to-length　and　depth-to-diameter　ratios.　Differences　in　pit　geometry　and　the　resulting　changes　in　stress　concentrations　due　to　corrosion　should　be　considered　when　assessing　fatigue　performance.