| Honorific-Prefix: | The Honourable |
| Isaac Lacson | |
| Office: | Senator of the Philippines from the 8th District |
| Term Start: | 5 June 1934 |
| Term End: | 16 September 1935 |
| Alongside: | Gil Montilla |
| Predecessor: | Francisco Zulueta |
| Successor: | office abolished |
| Office2: | Member of the House of Representatives from Negros Occidental's 3rd district |
| Term Start2: | 2 June 1925 |
| Term End2: | 5 June 1928 |
| Predecessor2: | Eliseo Limsiaco |
| Successor2: | Emilio Montilla |
| Office3: | Governor of Negros Occidental |
| Term Start3: | 16 October 1931 |
| Term End3: | 12 July 1934 |
| Predecessor3: | Agustin Ramos |
| Successor3: | Ramon Severino |
| Party: | Nacionalista |
| Birth Date: | 28 July 1889 |
| Birth Place: | Talisay, Negros Occidental, Captaincy General of the Philippines |
Isaac Araneta Lacson (Born 28 July 1889 - 4 October 1964)[1] was a Filipino politician who served as the Governor of Negros Occidental during the American occupation.
Lacson was born on July 28, 1889 in Talisay, Negros Occidental to General Aniceto Lacson, a revolutionary hero who then served as the President of the short lived Republic of Negros during the Philippine Revolution, and Rosario Araneta, a matron of the Araneta clan of the Philippines.
He attended the Ateneo de Manila and graduated in 1910 from the San Juan de Letran College with a Bachelor of Arts degree.[1]
In 1925, he was elected to the House of Representatives representing the 3rd district of Negros Occidental, serving until 1928. He then became Governor of Negros Occidental[1] from 1931 to 1934, when he was elected to the Philippine Senate as the representative of the 8th senatorial district composed of the Negros provinces, Antique and Palawan. He served in the Senate until its abolition in 1935.[2] As a senator, he served as chairman of the committees on banks and corporations and franchises.[1]