| Benjamín Aceval | |
| Office: | Paraguayan Ambassador to the United States |
| Office2: | Minister of Foreign Affairs of Paraguay |
| Predecessor2: | Facundo Machaín |
| Successor2: | Juan Antonio Jara |
| Predecessor3: | Juan Antonio Jara |
| Successor3: | José Segundo Decoud |
| Predecessor4: | José Segundo Decoud |
| Successor4: | José Segundo Decoud |
| Birth Name: | Tomás Benjamín Aceval Marín |
| Birth Place: | Asuncion |
| Death Place: | Asuncion |
| Alma Mater: | 1873 Doctor of Law of the University of Buenos Aires. |
Tomás Benjamín Aceval Marín (1845 – July 25, 1900) was a Paraguayan statesman, educator and diplomat.
He spent most of his youth in Argentina, where he finished his law studies in 1873.
1874 he was minister of justice in the Government of Juan Bautista Gill.[1]
From to he was Minister Plenipotentiary in special mission in Washington, D.C. and represented the government of Higinio Uriarte in the Chaco Boreal dispute with Argentina, after the Paraguayan War, to the President of the U.S.A. Rutherford B. Hayes. In his arbitration, Hayes awarded the region to Paraguay.
From March 1879 to 1886 he was rector of the Colegio Nacional de la Capital.
In 1886, he was foreign minister in the Government of Patricio Escobar.
On he negotiated with the Bolivian plenipotentiary Isaac Tamayo,[2] the abortive Aceval-Tamayo Treaty.[3]
He was Minister of Finance of Paraguay from 1895 to 1897.[4]
He died of Bubonic plague, amidst an epidemic that hit Asuncion.
Benjamín Aceval, a town in the Department of Presidente Hayes in Paraguay is named in his honor.[5]