Metro Police Chief Robert White said the unidentified female officer was shot twice in her thigh during a scuffle with the male suspect, who suffered unspecified gunshot wounds, WLKY-TV of Louisville said.
White said the officer was in stable condition following the incident, which began after she responded to a domestic disturbance call.
The police chief added that the suspect allegedly shot his girlfriend and a neighbor, leaving the unidentified victims in serious but stable and stable condition, respectively.
The suspect, whose identity wasn't reported, was subdued by police officers using a stun gun.
White told WLKY-TV the officer's stolen weapon was used in all of the shootings.