San Isidro, Nueva Ecija

San Isidro
Municipality of San Isidro
San Isidro Municipal Hall
Saint Isidore the Farmer Parish Church
Epifanio de los Santos Monument
Map of Nueva Ecija with San Isidro highlighted
Interactive map of San Isidro
San Isidro
Location within the Philippines
Coordinates: 15°18′35″N 120°54′25″E / 15.3097°N 120.9069°E / 15.3097; 120.9069
CountryPhilippines
RegionCentral Luzon
ProvinceNueva Ecija
District 4th district
Barangays9 (see Barangays)
Government
 • TypeSangguniang Bayan
 • MayorCesario Dong I. Lopez Jr.
 • Vice MayorRobinson DC. Francisco
 • RepresentativeEmerson D. Pascual
 • Municipal Council
Members
  • Maria Czarina B. Velasco-Taberna
  • Noel V. Lorenzo
  • Archie N. Napao
  • Paul Andrew L. Franco
  • Jayson Y. Cablao
  • Dante M. Dela Cruz
  • Carlos M. Francisco
  • Pamela P. Magno
 • Electorate34,638 voters (2025)
Area
 • Total
56.49 km2 (21.81 sq mi)
Elevation
21 m (69 ft)
Highest elevation
35 m (115 ft)
Lowest elevation
12 m (39 ft)
Population
 (2024 census)
 • Total
55,108
 • Density975.5/km2 (2,527/sq mi)
 • Households
12,828
Economy
 • Income class2nd municipal income class
 • Poverty incidence
9.03
% (2021)
 • Revenue₱ 244.2 million (2022)
 • Assets₱ 613.6 million (2022)
 • Expenditure₱ 210.5 million (2022)
 • Liabilities₱ 196.2 million (2022)
Service provider
 • ElectricityNueva Ecija 1 Electric Cooperative (NEECO 1)
Time zoneUTC+8 (PST)
ZIP code
3106
PSGC
IDD:area code+63 (0)44
Native languagesKapampangan
Tagalog
Ilocano

San Isidro, officially the Municipality of San Isidro (Tagalog: Bayan ni San Isidro, Kapampangan: Balen ning San Isidro), is a municipality in the province of Nueva Ecija, Philippines. According to the 2024 census, it has a population of 55,108 people.

It became the capital of the Philippines during the First Philippine Republic when President Emilio Aguinaldo was moving north to avoid being captured by American forces. This municipality also has the first high school in the Philippines outside Manila