| José Tadeo Monagas | |
| Order: | President of Venezuela |
| Term Start: | 1 March 1847 |
| Term End: | 5 February 1851 |
| Predecessor: | Carlos Soublette |
| Successor: | José Gregorio Monagas |
| Term Start2: | 20 January 1855 |
| Term End2: | 15 March 1858 |
| Predecessor2: | José Gregorio Monagas |
| Successor2: | Pedro Gual Escandon |
| Birth Date: | 1784 10, df=yes |
| Birth Place: | Maturín, Monagas |
| Death Place: | Caracas |
| Party: | Conservative Party Liberal Party |
| Signature: | José Tadeo Monagas Signature.svg |
| Spouse: | Luisa Oriach Ladrón de Guevara |
José Tadeo Monagas Burgos (28 October 1784 – 18 November 1868) was the president of Venezuela 1847–1851 and 1855–1858, and a hero of the Venezuelan War of Independence.
In 1846, to head off the challenge from the Liberal Party, ex-President and kingmaker José Antonio Páez selected Monagas as Conservative candidate. Páez thought Monagas could be controlled but he gravitated toward the Liberals, and eventually dispersed the Congress. In 1848 Páez led a rebellion against Monagas but was defeated by General Santiago Mariño in the 'Battle of the Araguatos', imprisoned, and eventually exiled.[1]
As a member of the Liberal Party, he abolished capital punishment for political crimes. The Liberal Party also passed laws that abolished slavery, extended suffrage, and limited interest rates. José Tadeo Monagas also supported his brother José Gregorio for the presidency.
José Tadeo Monagas and his brother José Gregorio Monagas combined rule 1847–1858 is commonly referred to as the Monagas Dynasty or "Monagato". During José Tadeo's second term, the Monagas brothers attempted to end term limits and extend presidential terms to six-years, which instead ended with the overthrow of José Tadeo at the hands of Julián Castro and his Liberal and Conservative allies.
Monagas was married to Luisa Oriach Ladrón de Guevara, who served as First Lady of Venezuela from 1847 until 1851. She was then First Lady again from 1855 until 1858.