| Type: | Bishop |
| Honorific-Prefix: | The Most Reverend |
| Luigi Maria Marelli | |
| Bishop of Bergamo | |
| Church: | Roman Catholic Church |
| Diocese: | Bergamo |
| Appointed: | 15 December 1914 |
| Enthroned: | 11 April 1915 |
| Term End: | 14 April 1936 |
| Predecessor: | Giacomo Radini-Tedeschi |
| Successor: | Adriano Bernareggi |
| Ordination: | 11 June 1881 |
| Ordained By: | Luigi Nazari di Calabiana |
| Consecration: | 6 January 1908 |
| Consecrated By: | Andrea Carlo Ferrari |
| Rank: | Bishop |
| Birth Date: | 1858 4, df=yes |
| Birth Place: | Milan, Lombardy, Italy |
| Death Place: | Rho, Lombardy, Italy |
| Buried: | Bergamo Cathedral, Crypt |
| Nationality: | Italian |
| Religion: | Roman Catholic |
| Motto: | Latin: Innocua vigilo |
| Luigi Maria Marelli | |
| Dipstyle: | The Most Reverend |
| Offstyle: | Your Excellency |
| Relstyle: | Monsignor |
| Deathstyle: | none |
Luigi Maria Marelli (1858-1936) was an Italian prelate named by pope Benedict XV bishop of Bergamo.[1]
Born in Milan, Marelli was appointed bishop of Bobbio by pope Pius X in 1907 and in 1914 after the death of Giacomo Radini-Tedeschi he was transferred to the see of Bergamo. In 1920 pope Benedict XV sent to Marelli a letter, in the letter the pope affirmed the duty of the church to fight against Socialism but he also reaffirmed the importance of social teaching of Catholic Church[2] Marelli died in 1936 in Rho, Lombardy.