Ruth (or its variants) may refer to:

• Château de Ruthie, castle in the commune of Aussurucq in the Pyrénées-Atlantiques département of France

• Ruth, a hamlet in Cologny

• Ruth, Alabama
• Ruth, Arkansas
• Ruth, California
• Ruth, Louisiana
• Ruth, Kentucky
• Ruth, Michigan
• Ruth, Mississippi
• Ruth, Nevada
• Ruth, North Carolina
• Ruth, Virginia
• Ruth, Washington
• Ruth, West Virginia

• Ruth (lunar crater), crater on the Moon
• Ruth (Venusian crater), crater on Venus
• 798 Ruth, asteroid

• Ruth (biblical figure)
• Ruth (given name) contains list of namesakes including fictional
• Princess Ruth or Keʻelikōlani, (1826–1883), Hawaiian princess

• A. S. Ruth, American politician
• Babe Ruth (1895–1948), American baseball player
• Connie Ruth, American politician
• Earl B. Ruth (1916–1989), American politician
• Elizabeth Ruth, Canadian novelist
• Heidi Ruth (born 1996), American soccer player
• Kristin Ruth, American judge
• Nancy Ruth, Canadian politician
• Hampton Del Ruth (1879–1958), American film actor and producer
• Roy Del Ruth (1893–1961), American film director
• Thomas Del Ruth (born 1942), American cinematographer
• William Chester Ruth (1882–1971), American inventor

• Ruth, code name of Pridi Banomyong, former Prime Minister and leader of the Thai underground against the Japanese occupation during World War II

• Citizen Ruth (1996), a movie about abortion in the United States

• Ruth (novel), an 1853 novel by Elizabeth Gaskell
• The Book of Ruth (novel), a 1988 novel by Jane Hamilton

• Ruth (band), American band out of Vancouver, Washington
• Ruth Ruth, American pop punk band
• Ruth (album), by American indie folk group Nana Grizol (2010)

• Ruth (Hayez), an 1853 painting by the Italian artist Francesco Hayez

• Ruthie on the Telephone, a series aired on the CBS Television network during 1949
• "Ruthie" (BoJack Horseman)

• Book of Ruth, a book of the Hebrew Bible/Old Testament

• Baby Ruth, candy bar
• Ruth–Aaron pair, two consecutive integers for which the sums of the prime factors of each integer are equal
• Ruth's Chris Steak House, an American restaurant chain

• Typhoon Ruth, name of several tropical cyclones worldwide
• Rolandas Kalinauskas RK-5 Ruth, a Lithuanian light aircraft design
• Ruth, one of the unsuccessful tests of the Uranium hydride bomb

• Ruth Island, artificial island off Saint Croix, U.S. Virgin Islands
• Ruth Lake (disambiguation)