Lambayeque province is the oldest and largest of three provinces in Peru's Lambayeque Region. The province was established on February 12, 1821, by José de San MartÃÂn, originating from the former administrative entity known as the under the Intendancy of Trujillo. As such, it originally spanned the entire modern-day Department of Lambayeque, along with the provinces of Chepén and Pacasmayo, until the province of Chiclayo was definitively created in March 1839 (with a brief period in April 1835).
The province has an area of and is divided into twelve districts.
The province has an approximate population of 230,385 inhabitants.
The provincial capital is the city of Lambayeque.