Verizon FiOS is a bundled Internet access, telephone, and television service which operates over a fiber-optic communications network. It is offered in some areas of the United States by Verizon Communications and Frontier Communications. Verizon was one of the first major U.S. carriers to offer fiber to the home, and received positive ratings from Consumer Reports among cable television and Internet service providers. Other service providers often use fiber optics in the network backbone and existing copper or infrastructure for residential users. Service began in 2005, and coverage areas expanded through 2010, although some areas do not have service or cannot receive TV and phone service because of franchise agreements.

As described in 2007, Verizon FiOS services are delivered over a fiber-to-the-premises network using passive optical network technology. Voice, video, and data travel over three wavelengths in the infrared spectrum. To serve a home, a single-mode optical fiber extends from an optical line terminal at a FiOS central office out to the neighborhoods where a passive optical splitter fans out the same signal on up to 32 fibers, thus serving up to 32 subscribers. At the subscriber's home, an Optical Network Terminal (ONT) transfers data onto the corresponding in-home copper wiring for phone, video and Internet access. Older FiOS installations mount the ONT inside the house and use Category 5 cable for data and coaxial cable for video, while newer markets mount the ONT outside the house and use Multimedia over Coax Alliance (MoCA) protocol for both data and video over a single coaxial cable. Voice service is carried over the existing telephone wires already in the house.