Kappa（大写Κ，小写κ，中文音译：卡帕），是第十个希腊字母。

• 在数学上，Kappa curve以此字母命名。
• 在物理学上，用作振动的扭转系数。
• 意大利运动休闲服装公司：Kappa。

Kappa (uppercase Κ, lowercase κ or cursive ϰ; Greek:κάππα, káppa) is the 10th letter of the Greek alphabet, used to represent the /k/ sound in Ancient and Modern Greek. In the system of Greek numerals, Kʹ has a value of 20. It was derived from the Phoenician letter kaph . Letters that arose from kappa include the Roman K and Cyrillic К.