Yumilka Daysi Ruíz Luaces (born 8 May 1978) is a Cuban retired volleyball player who represented her native country in four consecutive Summer Olympics, starting in 1996.

[1] She won Olympic gold medals with the national team in 1996[2] and 2000.

[4] As an outside hitter, she was integral to the dominance of the Cuban team in the late 1990s and early 2000s.

[5] In 2023, Ruíz was inducted into the International Volleyball Hall of Fame.

[1][5] Ruíz played the 2004–05 season with the Russian club Uralochka-NTMK, where she set the record of scoring 53 points in a single match and led her team to the championship title.