The 2013 awards ceremony attracted a 10.1 demo score and 28.37 million viewers from 8pm.
While this is level with its 2011 broadcast, it is vastly down from last year's big 14.1 score, which was aired soon after the death of Whitney Houston.
Earlier in the evening, 60 Minutes achieved a 1.9 (11.13m) at 7pm.
Fox's The Cleveland Show rose two tenths from last week to 1.3 (2.75m) at 7.30pm. The Simpsons dropped three tenths to 2.0 (4.19m) at 8pm.
Bob's Burgers was down two tenths to 1.8 (4.5m) at 8.30pm. Family Guy fell nearly half a ratings point to 2.5 (4.71m) at 9pm. American Dad dropped two tenths to 2.0 (3.88m) at 9.30pm.
ABC's Once Upon a Time returned from its hiatus to a new series low score of 2.2 (7.08m) at 8pm.
Revenge was down three tenths to its own series low of 1.4 (5.20m) at 9pm. Revenge for Real premiered to a low 0.7 (2.78m) at 10pm.
NBC aired repeats all evening, with their highest rating going to rerun Saturday Night Live in the '80s (0.8/2.69m) at 9pm.