A riding boot is a boot made to be used for horse riding. The classic boot comes high enough up the leg to prevent the leathers of the saddle from pinching the leg of the rider, has a sturdy toe to protect the rider's foot when on the ground and has a distinct heel to prevent the foot from sliding through the stirrup. The sole is smooth or lightly textured to avoid being caught on the tread of the stirrup in the event of a fall.

The modern riding boot is relatively low-heeled, with a heel of less than one inch, though historically a higher heel was common, as it has always been critically important for riding boots to prevent the foot from slipping through the stirrup. Today, only some styles of cowboy boot retain a higher heel than other modern riding boots.