Per Nielsen, last night's State of the Union Address averaged 42,789,947 viewers across 11 networks (ABC, CBS, FOX, NBC, TEL, UNI, CNN, Centric, CNBC, FOXNC, and MSNBC.). That's down 11% from 2010 and 18% from 2009, but still 14% above George W. Bush's address in 2008.
Here's more detail on prior years:
