Manuel Antonio Blas Sáenz (b. around 1800 in Rivas) was a Nicaraguan politician who served as acting Supreme Director of Nicaragua from February 13 to April 4, 1845.
From January 20 to February 13, he served as provisional Supreme Director based in the city of Masaya, against the government of Silvestre Selva.
In 1843 Sáenz became a Senator in the Legislative Assembly, under Supreme Director Pablo Buitrago y Benavente, and initiated the law to found the first national newspaper in Nicaragua called "Registro Oficial".
[1] Silvestre Selva was appointed by the invading forces led by Francisco Malespín, as Supreme Director of Nicaragua.
He later returned to El Salvador where he was soon overthrown by Joaquín Eufrasio Guzmán and Fermín Palacios on February 15.