《阿依达》（Aida）是由朱塞佩·威尔第作曲的4幕歌剧。意大利文剧本由奇世蓝多尼（Antonio Ghislanzoni）编写，改编自马里埃特（Auguste Mariette）所写的故事。歌剧于1871年12月24日在埃及开罗的总督歌剧院首演。

对于该部歌剧的创作目的，坊间有很多误传。实际上《阿依达》并非为庆祝1869年通航的苏伊士运河，或开罗总督歌剧院的启用所作的。现在可确定的是该剧是由埃及总督伊斯梅尔爵士以150,000法郎邀请威尔第作曲，定于1871年1月上演，但因普法战争爆发而延迟上演。

Aida (Italian: [aˈiːda]) is an opera in four acts by Giuseppe Verdi to an Italian libretto by Antonio Ghislanzoni. Set in Egypt, it was commissioned by and first performed at Cairo's Khedivial Opera House on 24 December 1871; Giovanni Bottesini conducted after Verdi himself withdrew. Today the work holds a central place in the operatic canon, receiving performances every year around the world; at New York's Metropolitan Opera alone, Aida has been sung more than 1,100 times since 1886. Ghislanzoni's scheme follows a scenario often attributed to the French Egyptologist Auguste Mariette, but Verdi biographer Mary Jane Phillips-Matz argues that the source is actually Temistocle Solera.