Achille Apolloni (13 May 1823 – 3 April 1893) was an Italian prelate of the Catholic Church who enjoyed the career of someone from a distinguished family, working in the Roman Curia or the personal service of the pope, and promoted automatically without regard for personal merit.

Achille Apolloni was born in Anagni in the Papal States on 13 May 1823 to a noble family.

He became an auditor of the Sacred Roman Rota in 1867[2] and in 1868 Pope Pius IX charged him managing the delivery of charity to relieve the victims of the cholera epidemic in Albano.

[4] In 1882, Pope Leo XIII named him president of the special commission for the relations between the Holy See and civil tribunals.

[2] He received his red biretta and was assigned the deaconry of San Cesareo in Palatio on 27 May 1889.