By the virtue of the apostolic constitution "Christi Fidelium," promulgated by Pope John XXIII, the diocese was canonically erected on November 25, 1961, when it was excised from the Archdiocese of Manila (the territory of the civil province of Cavite, excluding Tagaytay) and the then-diocese, now Archdiocese of Lipa (the territory of the City of Tagaytay).

The image of Our Lady was canonically crowned by Cardinal Luis Antonio G. Tagle, then Archbishop of Manila and homegrown Bishop of Imus, in a solemn ceremony held in 2012.

The Catholic faith first came to Imus in 1571, then in Silang in 1581, in Cavite Viejo (now Kawit) in 1587, in Maragondon in 1611, Indang in 1655, Ternate in 1700 and in San Francisco de Malabon (now General Trias) in 1758.

Cavite is also where General Emilio Aguinaldo proclaimed the Philippine Independence from Spanish rule on June 12, 1898, in the town of Kawit.

It is geographically situated at the very entrance to Manila Bay, a location which has made it, along with Bataan on the north, the scene of many battles in the past.

[5] Early in the American regime, a U.S. naval garrison was stationed at Sangley Point in Cavite City after a civil government was established in 1901.

Today, Cavite is witnessing a more radical urbanization as factories, subdivisions, golf courses, resorts and an Export Processing Zone (EPZA) have sprung up in the province.

It comprises the civil province of Cavite and covers a land area of 1,287 km2 (497 sq mi), with a population of 1,643,549 of which 76 per cent are Catholics.