通用顶级域（英语：Generic top-level domain，缩写为gTLD）是互联网名称与数字地址分配机构（IANA）管理的顶级域（TLD）之一。该机构专门负责互联网的域名系统。

互联网名称与数字地址分配机构现界定了以下各组的顶级域：

通用顶级域主要由.com、.info、.net及.org等域名组成。同时，.biz、.name及.pro亦可视作「通用」性质，但这些域名指定为「限制」级别，规定申请者须提供资格证明。

Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last label of every fully qualified domain name. They are called generic for historic reasons; initially, they were contrasted with country-specific TLDs in RFC 920.