Biblioteca del Poder Legislativo de Uruguay, Legislative library in Montevideo, Uruguay

The Biblioteca del Poder Legislativo is a legislative library in the Legislative Palace that holds over 250,000 books, 700,000 newspapers, and 150,000 magazines. The collection serves both parliament members and the public through on-site consultation and digital access.

In 1883 the Chamber of Representatives discussed creating its own library, and a librarian post was funded in 1885. Deputy Gustavo Gallinal proposed merging the Senate and Chamber libraries in November 1923, but the unification law No. 8.417 only took effect on 31 May 1929. The library opened on 25 August 1929 and passed to the Administrative Commission of the Legislature by law No. 9.427 of 1934.

The library's name and role come from Law No. 8.417 of 31 May 1929, which merged the Senate and House libraries into one parliamentary and public institution. Its reading room sits inside the Legislative Palace, opened in 1925, where legislators and general readers share the same collection. Since the 1971 legal deposit law, it has received a copy of everything printed in Uruguay.

The library sits inside the Legislative Palace and serves both legislators and the general public; consultation and lending are open to national authorities, parliamentary staff and outside readers. It has received a copy of every work printed in Uruguay since the 1971 legal deposit law, so allow time to request items from the stacks.

Since Uruguay's legal deposit law passed in 1971, the library has received one copy of everything printed in the country, so its shelves grow with each new publication. The law turned a parliamentary collection into a record of national publishing.