text: In 2009, the show led other late night shows in ad revenue with $271 million. In February 2014, Advertising Age cited Kantar Media and Nielsen in reporting that for January to October 2013, Late Show attracted $179.6 million in advertising for CBS, higher than its seven late-night competitors on NBC, ABC, Comedy Central, and E!. Late Show also had the oldest median audience among those same peer broadcasts, at 58.9.
  The final episode of Late Show with David Letterman on May 20, 2015, was watched by 13.76 million viewers with an audience share of 9.3/24, earning the show its second-highest ratings (following the 1994 Olympics on February 25, 1994); further, it saw the show's highest demo numbers (4.1 in adults 25-54 and 3.1 in adults 18–49) since Oprah Winfrey's first Late Show appearance following the ending of her feud with Letterman on December 1, 2005. In a rarity for a late-night show, it was also the highest-rated program across all network television that night, beating out all  shows. In Canada, the final episode was watched by 784,000 viewers, representing 516,000 more viewers than the show's closest competitor.
  International broadcast
  In the UK the show was aired on Sky One, The Paramount Comedy Channel, ITV2, ITV4 and Diva TV. In Australia the show aired on Network 10 only hours after US broadcast. It was also shown for a week on BBC2 during Letterman's London shows in 1995.
  In Italy the show aired on Rai5, in English with Italian subtitles.