This paper examines the effect of hot dip galvanizing on the fatigue resistance of SAE 950X HSLA steels. Tensile and constant amplitude strain-controlled fatigue data for 0.123 in. gage galvanized steel are compared to data from three uncoated SAE 950X steels. Additionally, results of testing galvanized and uncoated 0.103 in. gage MAXI-FORM® 50 (SAE 950X) steel from a split coil are compared. Galvanizing produced essentially no changes in tensile or fatigue properties except in the extreme low-cycle fatigue regime where galvanizing caused a reduction in the fatigue ductility coefficient, εf́.