Namesakes
Fictional Characters from Television:
2 characters
Vicki Costa 1997 Just Shoot Me! 
Quentin Costa 2003 Nip/Tuck
Notable Athletes:
2 soccer
(soccer) Dante (a.k.a. Costa) 1983-
(soccer) Diego Costa 1988-
Notable Musicians:
2 singers
Elis Regina (a.k.a. Costa) 1945-1982
Gal Costa 1945-2022
Olympic Medalists:
1 bronze, 1 gold
(bronze) Héctor Costa 1952; 1956 basketball
(gold) Marlenis Costa 1992; 1996; 2000 volleyball
Portuguese Presidents and Prime Ministers:
2 prime ministers
(prime minister) Afonso Costa 1913-1914; 1915-1916; 1917
(prime minister) António Costa 2015-2024
Saints:
1 blessed
Blessed Paola Gambara-Costa 1473-1515