What is "casilla"

Casilla is a Spanish surname, and may refer to:

• Alexi Casilla (born 1984), Dominican Major League Baseball infielder
• José Antonio Casilla (born 1979), Spanish volleyball player
• Kiko Casilla (born 1986), Spanish footballer
• Robert Casilla (born 1959), American artist and illustrator
• Santiago Casilla (born 1980), Dominican Major League Baseball relief pitcher