José María Lacunza Blengio (18 August 1809 – 2 January 1869) was a Mexican politician and diplomat.

In 1836, with his brother Juan Nepomuceno Lacunza, he founded the Academia de Letrán [es], where he published his Historical Discourses.

[2] From 10 May 1849 to 15 January 1851, he held the position of Minister of Relations during the government of José Joaquín de Herrera.

Additionally, he worked on the Treaty of Guadalupe-Hidalgo, rejecting the free passage through the Isthmus of Tehuantepec, which the United States government claimed, could maintain the negative in favor of national sovereignty.

He was president of the Senate and was in charge of the Directorate General of Funds and Public Instruction, being Minister of Finance during the presidential term of Benito Juárez.