Slottsbacken, Pedestrian square at Royal Palace, Stockholm, Sweden

Slottsbacken is a cobbled slope and open space in Gamla Stan, running from Stockholm Cathedral and the Royal Palace down to Skeppsbron by the waterfront. The palace's southern facade, with its Roman triumphal arch and six war trophies, faces this approach. The Tessin Palace and the Finnish Church line the southern side.

The plaza and its adjacent street are documented from the 1470s, while the current palace replaced the medieval castle Tre Kronor after a fire destroyed it in 1697. This rebuilding transformed this location into the primary entrance of the new royal residence in the city center.

The name Slottsbacken, recorded as Slotz bakkan in 1478, refers to the slope by the Royal Palace. The open space east of the cathedral was long called Sanden, and in the 1470s Stallbacken after the butchers' stalls near today's Källargränd. Since 2018 Karl XIV Johan's statue, moved from Slussen, stands on the square.

The slope runs from the cathedral and Royal Palace down to Skeppsbron by the waterfront; Källargränd leads south to Stortorget and Storkyrkobrinken continues west past the cathedral. The paving is small rounded cobblestone, uneven underfoot, and a shallow drainage channel crosses the lower right part. Tourist buses park at the top of the slope.

The obelisk on Slottsbacken was erected by Gustav III to thank Stockholm's burghers for keeping watch during the war of 1788–1790. It stands near the cathedral, not as a numbering reference. In the paving between cathedral and palace, two markings show the south-west bastion of the medieval castle and the eastern sanctuary of the medieval church demolished on Gustav Vasa's orders.