Janusz is a masculine Polish given name and a surname. It is a Polish form of the Latin name Johannes.

• Janusz I of Warsaw (c. 1340 – 1429), Duke of Warsaw
• Janusz III of Masovia (1502–1526), Polish duke of Masovia
• Janusz Aleksander Sanguszko (1712–1775), Polish-Lithuanian Commonwealth magnate
• Janusz Bugajski (1954–2025), American political scientist and international relations scholar
• Janusz Chwierut (born 1965), Polish politician
• Janusz Dobrosz, Polish politician
• Janusz Jędrzejewicz (1885–1951), Polish politician and educator
• Janusz Kaczmarek (born 1961), Polish lawyer, prosecutor and politician
• Janusz Kiszka (1600–1653), Polish-Lithuanian politician and magnate
• Janusz Kochanowski (1940–2010), Polish lawyer and diplomat
• Janusz Kołodziej (politician) (born 1959), Polish politician
• Janusz Korwin-Mikke (born 1942), Polish conservative liberal political commentator and politician
• Janusz Krasoń (born 1956), Polish politician
• Janusz Leon Wiśniewski (born 1954), Polish scientist and writer
• Janusz Lewandowski (born 1951), Polish economist and politician
• Janusz Maksymiuk (born 1947), Polish politician
• Janusz Onyszkiewicz (born 1937), Polish mathematician, alpinist and politician
• Janusz Ostrogski (1554–1620), Polish-Lithuanian noble
• Janusz Palikot (born 1964), Polish politician, activist and businessman
• Janusz Pałubicki (born 1948), Polish politician and activist
• Janusz Radziwiłł (1579–1620), Polish nobleman
• Janusz Radziwiłł (1612–1655), Polish-Lithuanian noble and magnate
• Janusz Radziwiłł (1880–1967), Polish nobleman and politician
• Janusz Reiter (born 1952), Polish diplomat
• Janusz Śniadek (born 1955), Polish politician
• Janusz Suchywilk (c. 1310 – 1382), Polish nobleman
• Janusz Tazbir (1927–2016), Polish historian
• Janusz Tomaszewski (born 1956), Polish politician
• Janusz Tyszkiewicz Łohojski, Polish-Lithuanian Commonwealth magnate and politician
• Janusz Wiśniowiecki, starost of Krzemieniec
• Janusz Wojciechowski (born 1954), Polish politician
• Janusz Zabłocki (1926–2014), Polish politician, publicist, Catholic activist, lawyer and soldier of Armia Krajowa
• Janusz Zemke (born 1949), Polish politician
• Janusz Ziółkowski (1924–2000), Polish sociologist and politician

• Janusz Brzozowski (handballer) (born 1951), Polish handball player
• Janusz Cegliński (born 1949), Polish basketball player
• Janusz Centka, Polish glider pilot
• Janusz Dziedzic (born 1980), Polish football striker
• Janusz Gol (born 1985), Polish football midfielder
• Janusz Gortat (1948–2023), Polish boxer
• Janusz Jojko (born 1960), Polish footballer
• Janusz Karweta (born 1988), Polish pair skater
• Janusz Kołodziej (speedway rider) (born 1984), Polish speedway rider
• Janusz Kupcewicz (1955–2022), Polish football player
• Janusz Krawczyk, Polish luger
• Janusz Krężelok (born 1974), Polish cross country skier
• Janusz Kudyba (born 1961), Polish football striker
• Janusz Kulig (1969–2004), Polish rally driver
• Janusz Kusociński (1907–1940), Polish athlete
• Janusz Majewski (fencer) (1940–2025), Polish Olympic fencer
• Janusz Michallik (born 1966), Polish-born retired soccer defender and current coach
• Janusz Patrzykont (1912–1982), Polish basketball player
• Janusz Pyciak-Peciak (born 1949), Polish modern pentathlete
• Janusz Sałach (born 1957), Polish cyclist
• Janusz Sidło (1933–1993), Polish javelin thrower
• Janusz Ślązak (1907–1985), Polish rower
• Janusz Sybis (born 1952), Polish football striker
• Janusz Trzepizur (born 1959), Polish high jumper
• Janusz Turowski (born 1961), Polish football coach and former player
• Janusz Waluś (born 1953), Polish ski jumper
• Janusz Wojnarowicz (born 1980), Polish judoka
• Janusz Wolański (born 1979), Polish football midfielder

• Janusz Akermann (born 1957), Polish painter
• Janusz Bardach, Polish gulag survivor and physician
• Janusz Bielański, Roman Catholic priest
• Janusz Bojarski (born 1956), Polish general
• Janusz Bokszczanin (1894–1973), Polish Army colonel
• Janusz Brzozowski (1935–2019), Polish-Canadian computer scientist
• Janusz Christa (1934–2008), Polish author of comic books
• Janusz Domaniewski (1891–1954), Polish ornithologist
• Janusz Gajos, Polish actor
• Janusz Gaudyn (1935–1984), Polish physician, writer and poet
• Janusz Głowacki (1938–2017), Polish-American author and screenwriter
• Janusz Grabowski (born 1955), Polish mathematician
• Janusz Janowski (born 1965), Polish painter, jazz drummer and art theorist
• Janusz Kamiński (born 1959), Polish cinematographer and film director
• Janusz Korczak (Henryk Goldszmit), Polish-Jewish children's author, pediatrician, and child pedagogist
• Janusz Kurtyka (born 1960), Polish historian specializing in the culture and religion of Poland in the 16th and 17th centuries
• Janusz Liberkowski (born 1953), winner of American Inventor season one
• Janusz Magnuski (1933–1999), Polish author and military historian
• Janusz Majewski (director) (1931–2024), Polish film director
• Janusz Meissner (1901–1978), Polish Air Force pilot, journalist and author
• Janusz Olejniczak (1952–2024), Polish classical pianist
• Janusz Paluszkiewicz (1912–1990), Polish actor
• Janusz Pasierb (1929–1993), Polish catholic priest, poet, writer, and historian
• Janusz Pawliszyn (born 1954), Polish chemist
• Janusz Pawłowski (born 1959), Polish judoka
• Janusz Piekałkiewicz (1925–1988), Polish underground soldier, historian, writer, and television/cinema director and producer
• Janusz Sanocki (1954–2020), Polish politician
• Janusz Skumin Tyszkiewicz, Lithuanian writer
• Janusz Spyra (born 1958), Polish historian specializing in Cieszyn Silesia
• Janusz Szpotański (1929–2001), Polish writer and chess player
• Janusz Szrom (born 1968), Polish jazz vocalist and composer
• Janusz Waluś (born 1953), Polish assassin
• Janusz Witwicki (1903–1946), Polish architect and art historian
• Janusz Wójcik (1953–2017), Polish politician, and former football player and coach
• Janusz Zajdel (1938–1985), Polish science-fiction author
• Janusz Zakrzeński (1936–2010), Polish actor
• Janusz Andrzej Zakrzewski (1932–2008), Polish physicist
• Janusz Zalewski (1903–1944), Polish sailor
• Janusz K. Zawodny (1921–2012), Polish-American historian, political scientist, and former World War II resistance fighter and soldier
• Janusz Zaorski (born 1947), Polish film director, scenarist and actor
• Janusz Żurakowski, Polish-born fighter and test pilot

• Aleksandra Janusz – Polish writer, molecular biologist (born 1980)
• Edmund Janusz [pl] (1928–2009), Polish officer of the Citizens' Militia
• Marcin Janusz – Polish volleyball player (born 1994)

• All pages with titles beginning with Janusz
• All pages with titles containing Janusz
• Janusz (stereotype)
• Janusz, Łódź Voivodeship, Poland