Lis (Polish for "Fox") is a Polish coat of arms. It was used by many noble families of Clan Lis.

In 1058 Duke Casimir I the Restorer while chasing the pagan Lithuanians and Yotvingians who devastated Polish lands, came to Sochaczew. He sent a knight of the Lis Clan (Fox Clan) to scout the region for enemies. When the knight came across a river he met a strong enemy unit. Unable to attack them alone, he decided immediately to shoot a lighted arrow into the air to call for reinforcements. Help arrived soon and defeated the enemies. A grateful Casimir granted the brave knight a new coat of arms with an arrow in the escutcheon and his former sign - the fox - was placed in the crest.

Notable bearers of this coat of arms have included:

• Krystyn z Kozichgłów
• Jaksa z Targowiska
• Mikołaj z Kozłowa
• Ferdynand Antoni Ossendowski
• Stanisław Chomętowski
• Sapieha Family
  • Adam Stefan Sapieha
  • Aleksander Michał Sapieha
  • Aleksander Paweł Sapieha
  • Jan Sapieha
  • Kazimierz Sapieha
  • Kazimierz Jan Paweł Sapieha
  • Lew Sapieha
  • Paweł Jan Sapieha
  • Kazimierz Nestor Sapieha
• Szymon Rudnicki, Bishop of Warmia
• Melchior Wańkowicz
• Henryk Samsonowicz
• Ferdynand Ruszczyc

• 
  Bianki (odm.)
• 
  Jerlicz (odm.)
• 
  Coat of Arms of Princes Sapieha
• 
  Coat of Arms of Princes Sapieha (1858-1859)

• J. Lyčkoŭski. "Belarusian Nobility Coats of Arms". Lis Coat of Arms (including altered) and their bearers (in English)

• Polish heraldry
• Heraldic family
• List of Polish nobility coats of arms

• Andrzej Kulikowski: Wielki herbarz rodów polskich. Warszawa: Świat Książki, 2005, s. 238-240. ISBN 83-7391-523-0.
• Jan Długosz: Jana Długosza kanonika krakowskiego Dziejów polskich ksiąg dwanaście, ks. IX. Kraków: 1867-1870, s. 264.
• Tadeusz Gajl: Herbarz polski od średniowiecza do XX wieku : ponad 4500 herbów szlacheckich 37 tysięcy nazwisk 55 tysięcy rodów. L&L, 2007. ISBN 978-83-60597-10-1.