The Serious Moonlight Tour was a worldwide concert tour by the English musician David Bowie, launched in May 1983 in support of his album Let's Dance (1983). The tour opened at the Vorst Forest Nationaal, Brussels, on 18 May 1983 and ended in the Hong Kong Coliseum on 8 December 1983; 15 countries visited, 96 performances, and over 2.6 million tickets sold. It was the biggest tour of the year 1983. The tour garnered mostly favourable reviews from the press. It was, at the time, his longest, largest and most successful concert tour to date, although it has since been surpassed in length, attendance and gross revenue by subsequent Bowie tours.

In 1980, David Bowie had released his album Scary Monsters (and Super Creeps), at the time expecting to support the album with a tour. However, the murder of John Lennon in December 1980 deeply affected Bowie and as a result, he cancelled his tour plans and withdrew to his home in Switzerland where he became a recluse and continued working. Consequently, the Serious Moonlight Tour was Bowie's first tour in 5 years.

This tour, designed to support Bowie's latest album Let's Dance, was initially designed to be a smaller tour, playing to the likes of sub-10,000-seat indoor venues around the world, similar to previous Bowie tours. However, the success of Let's Dance caused unexpectedly high demand for tickets: there were 250,000 requests for 44,000 tickets at one show, for example, and as a result the tour was changed to instead play in a variety of larger outdoor and festival-style venues. While reviewing the album the week following its release, the Billboard Magazine stated that "Bowie's first tour in five years would only enhance sales fire".

The largest crowd for a single show during the tour was 80,000 in Auckland, New Zealand, while the largest crowd for a festival date was 300,000 at the US 83 Festival in California. The tour sold out at every venue it played.

Bowie used boxing (of which he was a fan) to get in shape for the tour. His son Duncan Jones pointed out years later that "Each round [of boxing] is approximately the same length as a song, so if you can get your cardio up enough to do a full 12 or so rounds, you’re ready to go!"

Initially, Bowie worked with Derek Boshier to design the stage for the tour, as Boshier had designed the artwork for the Let's Dance album itself. The design proposed by Boshier was an "extravagant design reminiscent of the Diamond Dogs set with multiple platforms and levels, rotating prisms revealing different backdrop designs on each facet, and a gigantic cartoon figure of Bowie with a guitar", but this was rejected as too expensive, so instead Bowie worked with Mark Ravitz to come up with what was the final design, which included four giant columns (affectionately referred to as "condoms") as well as a large moon and a giant hand. Ravitz had designed the set for Bowie's 1974 Diamond Dogs Tour, and would work on Bowie's next touring set as well, the 1987 Glass Spider Tour.

The Serious Moonlight stage was deliberately given a vertical feeling (especially due to the columns) and an overall design that Bowie called a combination of classicism and modernism. The weight of one set (of which there were two) was 32 tons. Lighting the set were 40 Vari-Lites, some of which were set horizontally across the stage, which allowed them to "create set-piece landscapes" for certain songs.

Bowie used the musicians he'd newly collaborated with on Let's Dance, along with some longer standing collaborators, including Carlos Alomar who was the designated tour band leader. Stevie Ray Vaughan, who had contributed guitar solos to six of the songs on Let's Dance and who was up and coming, was to join the tour, also to please the American audience. Early rehearsals were held in Manhattan without Vaughan and Bowie, and were overseen by Alomar. Rehearsals moved to Las Calinas, Texas in April, where Bowie and Vaughan joined the band, but Vaughan showed up with a cocaine habit, a hard-partying wife and an entourage looking for easy access to drugs. Given that Bowie himself had moved to Berlin in the late 1970s to try and kick his own cocaine habit, Bowie and Vaughan's management failed to come to an agreement on how to temper the situation, and in the end Vaughan pulled out of the tour. Bassist Carmine Rojas called Vaughan's release "one of the most heartbreaking moments he had ever witnessed on the road, Stevie left standing on the sidewalk with his bags surrounding him." Bowie, who was in Europe promoting the album and tour when the disagreement arose, did not have a say in Vaughan's departure. This happened less than one week before the tour's opening night, and as a result, Vaughan's replacement Earl Slick spent the next few days in his hotel room, learning all of the 31 songs on the setlist.