A •
Alexander Ritter (1833–1896), German composer, violinist, and conductor •
Alison Ritter, Australian drug policy academic •
Allen Ritter, American songwriter and record producer •
Alois Ritter (1897–1966), Liechtenstein politician •
August Ritter (civil engineer) (1826–1908), German civil engineer •
August Gottfried Ritter (1811–1885), German composer and organist
B •
Bill Ritter (born 1956), American politician from Colorado •
Bill Ritter (journalist) (born 1950), American news anchor in New York City •
Bruce Ritter (1927–1999), American Catholic priest •
Burwell C. Ritter (1810–1880), American politician from Kentucky
C •
Carl Ritter (1779–1859), German geographer •
Christian Ritter (1645–50 – after 1725), German composer and organist •
Christian Ritter (footballer) (born 1984), German football player
D •
Dominik Ritter (born 1989), Swiss football player •
Donald L. Ritter (born 1940), American politician from Pennsylvania
E •
Erika Ritter (born 1948), Canadian playwright and humorist
F •
Floyd Ritter (1870–1943), baseball player •
Frédéric Louis Ritter (1834–1891), German-American composer and author •
Friedrich Ritter (1898–1989), German botanist, expert on cacti
G •
Gerhard Ritter (1888–1967), German historian •
Gerhard A. Ritter (1929–2015), German historian •
Gretchen Ritter, American academic administrator •
Gudrun Ritter (born 1936), German actress
H •
Halsted L. Ritter (1868–1951), American jurist •
Heinrich Ritter (1791–1869), German philosopher •
Henry Ritter (1816–1853), Canadian genre painter
I •
Irene Marschand Ritter (fl. 1913-1960), American composer
J •
J. Alfred Ritter (died 1892), American politician from Maryland •
Jason Ritter (born 1980), American actor, son of John •
Jeannie Ritter (born 1958), American First Lady of Colorado, US; wife of Bill •
Joachim Ritter (1903-1974), German philosopher •
Johann Christian Ritter (1755–1810), South African printer •
Johann Wilhelm Ritter (1776–1810), German chemist and physicist •
Johannes Ritter (born 1995), Danish footballer •
John Ritter (congressman) (1779–1851), American politician from Pennsylvania •
John Ritter (1948–2003), American actor, son of Tex •
John H. Ritter (born 1951), American young-adult baseball novelist •
John Steele Ritter, American pianist •
Joseph Ritter (1892–1967), American cardinal and archbishop •
Josh Ritter (born 1976), American singer-songwriter
K •
Krysten Ritter (born 1981), American actress
L •
Lawrence Ritter (1922–2004), American baseball writer •
Lorenz Ritter (1832–1921), German painter •
Lou Ritter (1925–2010), American politician from Florida •
Louise Ritter (born 1958), American track and field athlete
M •
Matthew Ritter, American politician •
Markus Ritter (art historian) (born 1967), German art historian •
Markus Ritter (born 1967), Swiss politician •
Maya Ritter (born 1993), Canadian actress •
Michael Ritter (born 1957), Liechtenstein politician
N •
Nikolaus Ritter (1899–1974), German intelligence officer
O •
Ole Ritter (born 1941), Danish cyclist
P •
Paul Ritter (1966–2021), British actor •
Paul Ritter (architect) (1925–2010), Australian architect, artist and author •
Paul Ritter (painter) (1829–1907), German architectural painter and etcher •
Paul Ritter (diplomat) (1865–1921), Swiss diplomat •
Preston Ritter (1949–2015), American rock drummer
R • Rex Ritter, American guitarist,
Jessamine •
Robert Ritter (1901 – c. 1951), German psychologist whose work led to the genocide of the Roma people in Nazi Germany •
Rupert Ritter (1900–1975), Liechtenstein lawyer •
Ryan Ritter (born 2000), American baseball player •
Karlheinz Ritter (1929–2008), Liechtenstein politician
S •
Sabine Ritter (born 1968), German politician and sociologist •
Scott Ritter (born 1961), chief United Nations weapons inspector in Iraq • Sylvester Ritter (1952–1998), ring name
Junkyard Dog, American wrestler
T •
Tex Ritter (1905–1974), American singer and actor, father of John •
Thelma Ritter (1902–1969), American actress •
Tyson Ritter (born 1984), American musician,
The All-American Rejects W •
William Ritter (1867–1955), Swiss writer •
William Emerson Ritter (1856–1944), American biologist •
William M. Ritter (1864–1952), American businessman
Others •
Mary Ritter Beard (1876–1958), American historian and campaigner for woman's suffrage •
F. Ritter Shumway (1906–1992), American figure skater •
Albert Ritter Conti v. Cedassamare (1887–1967), Italian-American character actor •
Pavao Ritter Vitezović (1652–1713), Croatian writer, historian, linguist, and publisher ==Fictional characters==