Leiria is a city and a municipality in the Centro Region of Portugal and in the historical province of Beira Litoral. It is the capital of Leiria District. The population in 2011 was 126,879, in an area of 565.09 square kilometres (218.18 sq mi). It is the seat of the Roman Catholic Diocese of Leiria-Fátima.

In addition to being a site of historical interest, the castle of Leiria provides a venue for cultural events. Nearby is the Church of Saint Peter (Igreja de São Pedro), the site of the city's annual music festival. Leiria is home to the Museu da imagem em movimento (Museum of the Moving Image) as well as Portugal's restored first paper mill, Moinho do Papel (The Paper Mill), the Theatre Miguel Franco in the Mercado de Sant'Ana (Saint Anne's Market) and the Theatre José Lúcio da Silva are venues for theatrical, musical, cinematic and dance performances.

Today the central square, Praça Francisco Rodrigues Lobo, named after the Portuguese poet Francisco Rodrigues Lobo, is home to a thriving café culture, regularly used for cultural events. The city was the principal residence of the Portuguese king, Denis, who wrote lyric poetry in the troubadour tradition, and the birthplace of the modern realist writer Eça de Queiroz, whose first novel, O Crime do Padre Amaro ("Father Amaro's Sin"), published in 1875, is set in the city.

In October 2012, Leiria opened the city's "Centro Cívico", a modern architecture building, designed to have social impact on the community. This building has the life of Eça de Queiroz as a theme. In here, there's senior classes and Associação Fazer Avançar runs SPEAK, with support from EDP and Calouste Gulbenkian Fundations, among others.

The city has several cultural entities like Leiria's Public Library Afonso Lopes Vieira, Arquivo, Ateneu, Leirena and O Nariz (theatre groups), Associação Fazer Avançar, FADE IN, Metamorfose, ECO and many others that make Leiria a culturally vibrant city, offering the busiest calendars of events.

In recent years, Leiria has seen much redevelopment on the banks of the river Liz, with the creation of several new parks, public spaces, children's play areas and a series of themed bridges. A long riverside promenade was built which is popular with walkers and joggers.

Since 2010, Associação FADE IN organizes ENTREMURALHAS, one of the most important gothic festivals in the world (List of gothic festivals).