Casti can refer to: Casti connubii, a papal encyclical Casti-Wergenstein, a Swiss municipality composed of Casti and Wergenstein People Emanuela Casti, Italian geographer Giovanni Battista Casti, Italian poet Giuseppe Casti, Italian politician John Casti, author, mathematician, and entrepreneur See also Kasti (disambiguation) Emmanuel Castis, South African actor, singer, and dancer Gasti, village in Iran