Jirón Junín is a major street in the Damero de Pizarro, located in the historic centre of Lima, Peru.

The street starts at its intersection with the Jirón de la Unión and continues for 19 blocks until it reaches Nicolás Ayllón Avenue.

[1] In its first block, to the south, the extension corresponding to the Plaza de Armas was arranged and, to the north, the land corresponding to the home of Pizarro himself and which was later the residence of the viceroys and Presidents of the country.

During the 19th century, this street saw the birth of the Congress of the Republic in 1822 and the establishment of the Senate Building in the old premises of the Tribunal of the Inquisition.

Prior to this renaming, each block (cuadra) had a unique name:[3] The street once housed, in its corner with the jirón Lampa (formerly Arzobispo and Santa Apolonia streets), the finca of Arturo López Jirón, a two-storey building which served mostly commercial purposes, having a long list of owners.