Louisa

Places

;Australia

• Louisa Island (Tasmania)

;Canada

• Louisa or Lac-Louisa, a community in Wentworth, Quebec

;Malaysia

• Louisa Reef, Sabah

;United States

• Louisa, Kentucky
• Louisa, Missouri
• Louisa, Virginia
• Louisa County, Iowa
• Louisa County, Virginia

;Belgium

• Louisa - Square in Brussels and metro station, next to Palace de Justice, see Avenue Louise

Other

• HMS Louisa, the name of four ships of the Royal Navy
• Louisa (ship), United States ship of the 1800s
• Louisa (film), 1950 film starring Ronald Reagan

People with the given name

• Louisa of Great Britain (1749–1768)
• Louisa, Countess of Craven, originally Louisa Brunton (1785?–1860), English actress
• Louisa Adams (1775–1852), First Lady of the United States from 1825 to 1829
• Louisa May Alcott (1832–1888), American novelist, short story writer and poet
• Louisa Rose Allen, English singer and songwriter known as Foxes
• Louisa Beaufort (1781–1863), Irish antiquarian, author and artist
• Louisa Dow Benton (1831–1895), American linguist and letter writer
• Louisa Bertman, Jewish American illustrator, animator, visual narrative artist specializing in social and political advocacy
• Louisa Briggs (1818 or 1836- 1925), Aboriginal Australian rights activist, dormitory matron, midwife and nurse
• Louisa Burns (c.1869–1958), American osteopathic physician
• Louisa Cavendish, Duchess of Devonshire
• Louisa Cavendish-Bentinck (1832–1918)
• Louisa Chafee (born 1991), American competitive sailor
• Louisa Chirico (born 1996), American tennis player
• Louisa Clein (born 1979), English actress
• Lady Louisa Conolly (1743–1821), Irish noblewoman
• Louisa Knapp Curtis (1851–1910), Columnist and first editor of the Ladies Home Journal
• Louisa Emily Dobrée (fl. ca. 1877–1917), French writer
• Louisa Lane Drew (1820–1897), English-born American actress
• Louisa Durrell (1886–1964)
• Louisa Frederici (1844–1921)
• Louisa Morton Greene, American social reformer
• Louisa Gould, Jewish activist
• Louisa Jane Hall (1802–1892), American poet, essayist, literary critic
• Louisa Hanoune (born 1954), Algerian politician
• Louisa Harland, Irish actress
• Louisa Horton (1920–2008), American film, television, and stage actress
• Louisa Jacobson (born 1991), American actress
• Louisa Vesterager Jespersen (died 2018), Danish female murder victim
• Louisa Johnson, English singer
• Louisa Krause (born 1986), American film, stage, and television actress
• Louisa Lawson (1848–1920), Australian poet, writer, publisher, suffragist, and feminist
• Louisa Lytton (born 1989), English actress
• Louisa Frederica Adela Schafer (b. 1865), English Esperantist, singer, translator and teacher
• Louisa Susannah Cheves McCord (1810–1879), American writer
• Louisa Moritz (1936–2019), Cuban-American actress and lawyer
• Louisa Starr (1845–25 May 1909), British painter
• Louisa Stone Stevenson (1879–1969), American chemistry professor
• Louisa Maria Stuart (1692–1712), Princess Royal
• Louisa Swain (1801–1880)
• Louisa Thomas (born 1981), American writer and sports journalist
• Louisa Caroline Huggins Tuthill (1799–1879), American children's book author
• Louisa Wilkinson (1889-1968), British military nurse and nursing administrator
• Louisa Wisseling, former member of Australian folk-influenced pop quartet The Seekers
• Louisa Young, British writer

Fictional characters

• Louisa Clarke, main character in Me Before You and its film adaptation
• Louisa Musgrove, character in Jane Austen's novel Persuasion
• Louisa, the pen name of the eighteenth century English writer Elizabeth Boyd (1710–1745)
• Louisa, a character in the American-Canadian animated series Work It Out Wombats!
• Louisa Loops, a character in the American-Canadian animated series Lyla in the Loop
• Louisa von Trapp, third daughter in the Von Trapp family in The Sound of Music