Might be easier to list where I'm NOT ticklish... but... just about everywhere. Neck, under arms, stomach, ribs/sides, waist, back, behind my knees, feet/toes, and a secret spot that I don't tell anyone.
P.S. Recent events have led me to add this. Even though I enjoy tickling and being tickled by women, I am a straight female. Thanks in advance for respecting that. :)