1. Hon. Doroteo Barbero Yoshisawa (1942-1943)
2. Hon. Estanislao Bueno Yoshisawa Regime (1943-1945)
3. Hon. Mateo A. Cadeliรฑa Appointed (1946), Elected (1952-1955)
4. Hon. Cornelio Alipio Appointed (1946), Elected (1947-1951)
5. Hon. Marcelo Santiago Elected (1956-1959)
6. Hon. Hermogenes Ramil Elected (1960-1962)
7. Hon. Braulio Lucas Elected (1962-1963)
8. Hon. Severo G. Lachica Elected (1964-1986)
9. Hon. Venancio O. Villarta Elected (1986-1998)
10. Hon. Feliciano V. Palomares Elected (1998-2001)
11. Hon. Roberto C. Agcaoil Elected (2001-2010)
12. Hon Crispina Agcaoil (2011-2019)
13. Hon. Greg Pua (2019 Present)
San Mateo is politically Subdivided into 33 barangays.
Bacarreรฑa
Bagong Sikat
Bella Luz Dagupan
Daramuangan Norte
Daramuangan Sur
Estrella
Gaddanan
Malasin
Mapuroc
Marasat
Grande
Marasat
Pequeรฑo
Old Centro I
Old Centro Proper
Barangay I (Pob.)
Barangay II (Pob.)
Barangay III
(Pob.) Barangay IV (Pob.)
Salinungan East
Salinungan West
San Andres
San Antonio
San Ignacio
San Manuel
San Marcos
San Roque
Sinamar Norte
Sinamar Sur
Victoria
Villafuerte
Villa Cruz
Villa Magat
Villa Gamiao