“NBC Nightly News” was America’s most-watched evening newscast for the 2015 May Sweep period, according to Nielsen Media Research Live+Same Day data.
The NBC broadcast averaged 7.708 million total viewers, +35,000 more than ABC and +1.075 million more than CBS.
Nightly has been #1 in total viewers for 31 consecutive sweep periods.
| Total Viewers | A25-54 Rating | A25-54 Viewers | A18-49 Ratings | A18-49 Viewers | |
| NBC | 7.708 | 1.47 | 1.761 | 0.98 | 1.240 |
| CBS | 6.633 | 1.23 | 1.469 | 0.80 | 1.019 |
| ABC | 7.673 | 1.52 | 1.823 | 0.99 | 1.255 |
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