Per Variety, the combined real time and next 24 hour viewership in the second quarter of 2025 was 1.77 million,Once again, not true. Here's 2024:
He was consistently #1 for broadcast TV.
Here is the Forbes report, also on the "normal" period prior to the Kirk controversy: "Jimmy Kimmel Ratings Over The Years: He Was No. 1 With Young Adults"
Here is another report on his ratings before the "Kirk Suspènsion" where his average was 1.1 million by August 2025.
Jimmy Kimmel’s late-night show was bleeding viewers before Disney-owned ABC pulled the plug and suspended him for his comments on Charlie Kirk’s assassination. Nielsen data showed sharp summer declines and a year-long slide that leaves him trailing late-night rivals such as Fox News’ Greg Gutfeld and CBS star Stephen Colbert. According to monthly Nielsen figures, “Jimmy Kimmel Live!” dropped to just 1.1 million total viewers in August 2025, down 43% from January’s 1.95 million. His August household rating of 0.35 marked the weakest showing of the year. (NY Post)
So the second quarter was around 1.77 million, but down to 1.1 million by August. (Caveat: the news media tends not to specify whether those numbers they publish are "live broadcast" only or include streaming after the broadcast in any format and, if so, whether "same day", "next 24 hours" or what.