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The year 1861 in architecture involved some significant architectural event and new buildings.
Buildings and structures
Buildings completed
thumb|[[St James the Less, Pimlico]]
- Arlington Street Church in Boston, Massachusetts, United States, designed by Arthur Gilman.
- St James the Less, Pimlico, London, designed by George Edmund Street.
- All Saints Notting Hill, London, designed by William White in 1852.
- St. Michael's Church, Berlin, designed by August Soller (who is buried here) in 1845 and completed by Richard Lucae (his nephew), Andreas Simons and Martin Gropius.
- Tromsø Cathedral, Norway, designed by Christian Heinrich Grosch.
- Palácio do Grão-Pará, Petrópolis, Brazil, designed by Theodore Marx with de Araújo Porto Alegre.
- Mary Birdsall House in Richmond, Indiana.
Awards
- RIBA Royal Gold Medal – Jean-Baptiste Lesueur.
- Grand Prix de Rome, architecture: Constant Moyaux.
Births
thumb|upright|[[William Cubitt]]
- January 6 – Victor Horta, Belgian architect and designer (died 1947)
- April 20 – Hermann Muthesius, German architect and writer on architecture (died 1927)
- July 17 – Horace Field, English architect (died 1948)
- September 2 – Arthur Beresford Pite, English architect (died 1934)
Deaths
- May 15 – Benjamin Woodward, Irish architect (born 1816)
- October 13 – Sir William Cubitt, English civil engineer (born 1785)