
The late night TV ratings scorecard is where we chart the ups and downs across a portion of the late night TV landscape on a weekly basis. The chart covers shows that begin between 11-11:35pm Eastern time. All the late night ratings results we see are below the chart.

The chart shows the late night adults 18-49 weekly average ratings beginning the first week of 2011.
Full late night ratings results for the week of August 22-26 via NBC press release (all Live+Same Day):
ADULTS 18-49
11:35 p.m.-12:35 a.m. ET
NBC “Tonight,” 0.8 rating, 3 share (in encore telecasts)
CBS “Late Show,” 0.8/311:35 p.m.-12 midnight ET
ABC “Nightline,” 1.0/412 midnight-1 a.m. ET
ABC “Kimmel,” 0.5/2 (in encore telecasts)12:35-1:35 a.m. ET
NBC “Late Night,” 0.5/3 (in encore telecasts)
CBS “Late Late Show,” 0.4/2*1:35-2:05 a.m. ET
NBC “Last Call,” 0.3/2 (in encore telecasts)TOTAL VIEWERS
11:35 p.m.-12:35 a.m. ET
NBC “Tonight,” 3.4 million viewers (in encore telecasts)
CBS “Late Show,” 3.1 million viewers*11:35 p.m.-12 midnight ET
ABC “Nightline,” 4.4 million viewers12 midnight-1 a.m. ET
ABC “Kimmel,” 1.7 million viewers (in encore telecasts)12:35-1:35 a.m. ET
NBC “Late Night,” 1.5 million viewers (in encore telecasts)
CBS “Late Late Show,” 1.5 million viewers*1:35-2:05 a.m. ET
NBC “Last Call,” 0.9 million viewers (in encore telecasts)* Friday's "Late Show" and "Late Late Show" were delayed by an NFL overrun and are excluded from these averages.
SELECTED CABLE RESULTS
NATIONAL ADULT 18-49 RATING
Comedy Central, 11-11:30 p.m. ET, “The Daily Show,” 0.4 (in encore telecasts)
Comedy Central, 11:30 p.m.-midnight ET, “The Colbert Report,” 0.3 (in encore telecasts)TBS, 11 p.m.-midnight, “Conan,” 0.3 (in encore telecasts)
TBS, midnight-1 a.m., “Lopez Tonight,” 0.1 (in encore telecasts)Adult Swim, 11:30 p.m.-12:30 a.m. ET, 1.1
Adult Swim, 12:30-1:30 a.m. ET, 0.7Each adult 18-49 rating point equals 1.31 million viewers
TOTAL VIEWERS
Comedy Central, 11-11:30 p.m. “The Daily Show,” 0.9 million (in encore telecasts)
Comedy Central, 11:30 p.m.-midnight ET, “The Colbert Report,” 0.7 million (in encore telecasts)TBS, 11 p.m.-midnight, “Conan,” 0.5 million (in encore telecasts)
TBS, midnight-1 a.m., “Lopez Tonight,” 0.2 million (in encore telecasts)Adult Swim, 11:30 p.m.-12:30 a.m. ET, 2.4 million
Adult Swim, 12:30-1:30 a.m. ET, 1.5 million
Notes: Because of network, timeslot and running time differences, the ratings comparisons in the chart are necessarily somewhat apples to oranges. The Tonight Show and The Late Show run 11:35p-12:35a, Nightline runs 11:35p-12:00a, Conan runs 11:00p-12:00a, and The Daily Show runs 11:00-11:30p. Here's a limited look at the advantage the earlier/shorter shows have in the ratings PR battle.
Assumptions are that the broadcast networks are in substantially all of the 115.9 million US TV households. TBS is in 101 million households, Comedy Central is in 99 million.
Those looking for the final tally/chart of Jay vs. Conan Tonight Show ratings click here.






