Notes:

Sally the Witch
by Mitsuteru Yokoyama
manga ran from 1966 till 1967 in Ribon, published by Shueisha
original anime adaptation aired from 1966 till 1968

It is techinically pre-dated by Fujio Akatsuka's Himitsu no Akko-chan which also ran in Ribon from 1962 till 1965
However Sally the Witch was the first magical girl series to get an anime adaptation, with Himitsu no Akko-chan only getting an anime adaptation in 1969