The new rollouts include Seattle, Pittsburgh, Boston, Las Vegas, Baltimore, Memphis and Nashville.
The other new markets are Cincinnati, West Palm Beach, San Antonio, Tampa, Columbus, Louisville and Jacksonville.
YouTube TV is now available in a total of 29 metro areas with YouTube reportedly planning to move into 17 more areas in the coming weeks.
YouTube first unveiled the service in March and initially introduced the over-the-top offering to Chicago, Philadelphia, New York City, the San Francisco Bay Area and Los Angeles. It added a further 10 metro areas in late July.
YouTube TV offers a line-up of more than 40 channels, including the some of the biggest US broadcast networks in ABC, CBS, FOX, NBC and ESPN.
It is available across devices, includes a cloud DVR with “no storage limits” for recording TV shows, and costs US$35 per month without commitments – substantially cheaper than a typical US cable subscription.