1966–67 United States network television schedule (late night)

These are the late night schedules on all three networks for each calendar season beginning September 1966. All times are Eastern/Pacific.

The United Network launched in spring 1967 with its lone program, The Las Vegas Show. The show and network ended after one month and 23 episodes, most of which aired on CBS stations in areas where the United Network did not own a station.

NET is not included, as member television stations have local flexibility over most of their schedules and broadcast times for network shows may vary, ABC is not included on the weekend schedules (as the network do not offer late night programs of any kind on weekends).

Talk/Variety shows are highlighted in yellow, Local News & Programs are highlighted in white.

ABC
New Series
 * The Joey Bishop Show

Not returning from 1965-66
 * ABC's Nightlife with Les Crane

NBC
Returning Series
 * The Saturday/Sunday Tonight Show
 * The Tonight Show Starring Johnny Carson

New Series
 * The Weekend Tonight Show *

U
New Series
 * The Las Vegas Show *