Ico may refer to:

• Ico, a 2001 action-adventure video game for the PlayStation 2
• Ico Hitrec (1911–1946), a Croatian football player
• Icó, a town in Ceará, Brazil

is a puzzle-platformer and action-adventure video game developed by Team Ico and published by Sony Computer Entertainment, released for the PlayStation 2 video game console in 2001 and 2002 in various regions. It was designed and directed by Fumito Ueda, who wanted to create a minimalist game around a "boy meets girl" concept. Originally planned for the PlayStation, Ico took approximately four years to develop. The team employed a "subtracting design" approach to reduce elements of gameplay that interfered with the game's setting and story in order to create a high level of immersion.

Icó is a town of 65,377 in Ceará.

The ICO file format is an image file format for computer icons in Microsoft Windows. ICO files contain one or more small images at multiple sizes and color depths, such that they may be scaled appropriately. In Windows, all executables that display an icon to the user, on the desktop, in the Start Menu, or in Windows Explorer, must carry the icon in ICO format.