Beatriz de Bobadilla (1440–1511) was a Castillian noble, courtier, and confidant of Queen Isabella I of Castile.

She was the childhood friend of Isabella and remained at her court as her adviser throughout her reign, once being subjected to an assassination attempt when mistaken for the queen.

[1] Her father was castellan of Arévalo Castle [es], where Isabel de Trastámara, future Queen regnant of Castile, grew up and was schooled.

[3] Bobadilla participated in Henry IV's attempts to keep Isabella and Ferdinand II of Aragon separate.

Juan Pacheco convinced Isabella's ladies-in-waiting that the marriage was perilous, as it could deliver Castile into the hands of Ferdinand's father, King John II.