| Luigi Mercatelli | |
| Order1: | Italian Commissioner-General of Somaliland |
| Term Start1: | 16 March 1905 |
| Term End1: | 1906 |
| Predecessor1: | Giorgio Sorrentino (commissioner) |
| Successor1: | Giuseppe Salvago Raggi |
| Order2: | Italian Governor of Tripolitana |
| Term Start2: | 6 July 1920 |
| Term End2: | July 1921 |
| Predecessor2: | Vittorio Menzinger |
| Successor2: | Giuseppe Volpi |
| Birth Date: | 21 October 1853 |
| Birth Place: | Alfonsine |
| Death Place: | Rio de Janeiro |
| Nationality: | Italian |
Luigi Mercatelli (21 October 1853 – 4 April 1922) was an Italian politician, attorney and diplomatic.[1]
Luigi Mercatelli was born in Alfonsine (near Ravenna, Italy) in 1853. Graduated as lawyer in Ferrara, showed since young sympathies for the development of Italian colonialism. He was friend of Giovanni Pascoli and wrote for the newspapers "Il Corriere di Napoli" and Il Mattino of Napoli. Mercatelli participated in the Eritrea conquest in the 1890s, supporting the colonialism of Prime Minister Giovanni Giolitti.
He was initially named "Consul of Italy in Zanzibar in 1903 and the Commissioner-general of Italian Somaliland (1905–1906). After World War I was named Governor of Italian Tripolitania (1920–1921).
He was the Italian ambassador in Rio de Janeiro when he died in 1922.