"Hard as a Rock" is a song by Australian hard rock band AC/DC, released in September 1995 by Elektra as the first single from their thirteenth studio album, Ballbreaker (1995). The song became their second No. 1 hit on the US Billboard Album Rock Tracks chart, following 1993's "Big Gun". Live performances are also included on three of AC/DC's live concert DVDs, No Bull, Stiff Upper Lip Live and Live at the Circus Krone, which is featured in the Deluxe Edition of the 2009 boxset Backtracks. A live version recorded during the band's Stiff Upper Lip World Tour in 2001 at the Stade de France in Paris appears on the 2007 Plug Me In three-disc DVD. It is also featured on the 2012 film Battleship, along with "Thunderstruck".

Ballbreaker is the thirteenth studio album by Australian hard rock band AC/DC. It was released in 1995 and was re-released in 2005 as part of the AC/DC Remasters series.