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 51st Grammy Awards with the song "Sex on Fire" receiving two nominations itself.
"Sex on Fire" came in at number one on the Triple J Hottest 100, 2008, with "Use Somebody" number three, "Closer" number 24 and "Crawl" number 70.
In September 2007, lead singer Caleb Followill confirmed to NME that tracks were already being worked on for a fourth album, only a few days after the release of the band's third album, Because of the Times. Recording began in February 2008 in Nashville's Blackbird Studios with assistant engineer, Lowell Reynolds. On June 23, 2008, the release date of September 22, 2008 was set, and also the new title was announced.
"Crawl" was released via the band's website as a free download for a short time, although it was not the first proper single. The first single "Sex on Fire", was released on September 15, 2008. The same day, music website Last.fm was the first to make the entire album available for streaming. The music video for "Sex on Fire" was later made available to stream on their website and YouTube channel. The song "Use Somebody" was announced as the second single, which was released in December 2008. The song was a massive hit in the United States, peaking at #4 on the Billboard Hot 100, and was a hit in the UK, Australia and several other countries. The third single released from the album was "Revelry", released on March 2, 2009.
"Notion" is the fourth single from the album. The video was released on June 1 and the song appear on radios on June 29. The song has been another success from the group, peaking at #1 on the Billboard Alternative Songs.
In Australia, the song "Manhattan" was released to radio as the fourth single. The song spent four weeks on the singles chart and peaked at number 38 and reached number two on the National Airplay Chart. The song has also had heavy rotation on UK radio station's such as Xfm. Another big hit was the album's opening track "Closer", which features a very melodic three note riff by bass player Jared Followill that utilises a Boss ME50 multi-effects pedal to add a distinctive octave sweep reminiscent of the Digitech Whammy.
The album was also awarded "2008 Album of the Year" by the UK's Q Magazine, as well as Rolling Stone voting it as the 20th best album out of their top 50 Best Albums of 2008. The album was also awarded Best International Album at the BRIT Awards, the Meteors and the Juno Awards.
The album was a massive success in the United Kingdom. At the end of September 2008, the album entered the UK Albums Chart at number one, with first week sales of over 220,000 copies. In February 2009, it was announced that Only by the Night is currently the biggest selling digital album of all-time in the UK, surpassing Amy Winehouse's Back to Black. Sales for 2008, in which Only By The Night was the third biggest selling album of the year, were 1,181,640 and a similar level of 1,078,555 for 2009, when it became the fifth biggest selling album of the year. It sold a further 340,000 units in 2010 and was placed at number 31 on the year-end chart. As of March 27, 2011, Only by the Night has spent 131 consecutive weeks inside the Top 75.
In Australia, the album has been certified 9× Platinum, selling over 630,000 copies. It re-entered the Australia charts at 43 in September 2010. The album was the highest selling album of 2008 in Australia. The album has also been a hit in New Zealand, spending over thirty consecutive weeks in the top ten, including nine non-consecutive weeks at number one. It finished 2008 as the second highest selling album and has been certified 5× Platinum by RIANZ.
In the U.S. the album debuted at number five on the Billboard 200, but fell to 20 the following week. It then dropped as low as 78, but then gradually moved back up the chart. After 48 weeks on the chart, the album managed to outpeak its debut position, climbing to number four. It has also managed to achieve a 2× platinum certification for shipping two million copies.
In Germany, Only by the Night has spent 104 weeks on the country's Albums Chart making it the 50th album to spend 2 years or longer on that chart.
Worldwide sales of the album exceed 6.2 million copies, according to a press release by the band.