"Only by the Night" experienced commercial success, peaking inside the top 10 of over 10 different countries. The album was certified the best-selling album in Australia, certified nine times platinum. It also went on to be the highest selling album of 2008 in Australia, the third best selling album of 2008 in the UK, winning two Brit Awards, and the 18th best-selling album of the 2000s in the UK. Furthermore, two singles from the album have found high chartings, "Sex on Fire" coming in at number one in Ireland, the UK, Australia, and on the United States' Hot Modern Rock Tracks, and at number two in New Zealand. The album's second single "Use Somebody" also charted at number two in the UK, and at number two in Australia, along with being the band's first top 10 hit in the U.S. The album was nominated for Best Rock Album at the 2009 Grammy Award with the song "Sex on Fire" receiving two nominations itself. Worldwide sales of the album exceed 6.2 million copies, according to a press release by the band.