Katharine Long or similar names may refer to:
Lady Catharine Long (1797–1867), English novelist and religious writer Kathleen Long (1896–1968), English pianist and teacher Katherine Long (died 1969), English animal welfare activist, co-founder of Beauty Without Cruelty Catherine Small Long (1924–2019), American congresswoman from Louisiana Kate Long (storyteller), American writer, journalist and songwriter Kate Long (born 1964), English author (The Bad Mother's Handbook) Kathy Long (born 1964), American kickboxer, mixed martial arts fighter and actress Kath Long, English environmental scientist, co-founder in 2010 of Well Grounded with Iola Leal Riesco Kat Long (born 1974), American journalist, author and social historian Catherine Crosby Long (born 1980), American beauty pageant winner, Miss Alabama 2003 Katie Long (born 1988), English field hockey forward Kay Long (1920–2007), British javelin thrower