| Honorific Suffix: | JD |
| Antonio Aldini | |
| Birth Date: | 27 November 1755 |
| Birth Place: | Bologna, Papal States |
| Death Place: | Pavia, Kingdom of Lombardy–Venetia |
| Nationality: | Italian |
| Occupation: | Lawyer and Politician |
| Alma Mater: | University of Bologna |
| Era: | Age of Enlightenment |
Antonio Aldini (27 November 1755, in Bologna – 30 September 1826, in Pavia) was an Italian lawyer and politician, active in the Cisalpine Republic, the Italian Republic and the Kingdom of Italy.
Antonio Aldini was born on 27 November 1755. When Bologna declared its independence from the Papal States, he was sent to Paris by his fellow-citizens. He was a member of the council of ancients in the Cisalpine Republic, and was held in much esteem by Napoleon, who created him a count and made him secretary of state to the Kingdom of Italy. He built an elegant château in the park of Montmorency, near Paris, which was destroyed during the occupation of Paris in 1815. In 1814 he was sent together with Vincenzo Berni degli Antoni to the Congress of Vienna, to lobby on behalf of the Papal Legations. In May 1815, he was granted an audience with Metternich to beg that Ferrara, Ravenna and Bologna be annexed by the Austrian Empire. After the re-establishment of the former rulers in Italy, Aldini resided in Pavia until his death, on 30 September 1826.