| Type: | Cardinal |
| Honorific Prefix: | His Eminence |
| Gaetano De Lai | |
| Vice-Dean of the College of Cardinals | |
| Church: | Roman Catholic Church |
| Appointed: | 23 March 1919 |
| Term End: | 24 October 1928 |
| Predecessor: | Luigi Oreglia di Santo Stefano |
| Successor: | Gennaro Granito Pignatelli di Belmonte |
| Ordination: | 16 April 1876 |
| Ordained By: | Costantino Patrizi Naro |
| Consecration: | 17 December 1911 |
| Consecrated By: | Pope Pius X |
| Cardinal: | 16 December 1907 |
| Created Cardinal By: | Pope Pius X |
| Rank: | Cardinal-Deacon (1907–11) Cardinal-Bishop (1911–28) |
| Birth Name: | Gaetano De Lai |
| Birth Date: | 26 July 1853 |
| Birth Place: | Malo, Vicenza, Kingdom of Lombardy–Venetia |
| Death Place: | Rome, Kingdom of Italy |
| Buried: | Campo Verano (1928–29) Santuario della Madonna Liberata di Malo |
| Parents: | Antonio De Lai Maria Silvagni |
Gaetano de Lai (26 July 1853 – 24 October 1928) was an Italian cardinal of the Roman Catholic Church. He was part of the Roman Curia. He was an outspoken defender of the French monarchist Action française.[1]
De Lai was born in Malo, Vicenza. He was made cardinal in 1907 by Pope Pius X, who also, four years later, consecrated him as titular bishop of Sabina in 1911.
He took part in the 1914 conclave which elected Pope Benedict XV, and the 1922 conclave which chose Pope Pius XI.
He died in Rome.