康卡斯特（英语：Comcast Corporation，NASDAQ：CMCSA）是美国一家有线电视、宽带网络及IP电话服务供应商，总部位于宾夕凡尼亚州费城，拥有2460万有线电视用户、1700万宽带网络用户及860万IP电话用户，是美国最大有线电视公司，远远抛离自称拥有1470万有线电视用户、720万宽带网络用户及230万IP电话用户的时代华纳有线（Time Warner Cable）。康卡斯特亦是美国第二大互联网服务供应商，仅次于AT&T之后，同时也是美国第四大电话业务供应商，在2008年《财富》杂志财富500强中排行第79。

Comcast Corporation, formerly registered as Comcast Holdings, is an American multinational mass media company and is the largest broadcasting and largest cable company in the world by revenue. It is the second largest pay-TV company after the AT&T-DirecTV acquisition, largest cable TV company and largest home Internet service provider in the United States, and the nation's third largest home telephone service provider. Comcast services U.S. residential and commercial customers in 40 states and the District of Columbia. The company's headquarters are located in Philadelphia, Pennsylvania.