Johannes-Brahms-Platz, Public square in Neustadt district, Hamburg, Germany.

Johannes-Brahms-Platz is a public square in Hamburg's Neustadt district where two major streets meet at its edges. The concert hall Laeiszhalle occupies the northern side while the Brahms-Kontor, a historic office building, anchors the southern boundary of the space.

The square arose in 1859 with the opening of the Holstentor, an extra city exit toward St. Pauli; the gate became redundant when the gate barrier was abolished in 1861, but the name Holstenplatz remained. From 1879, construction of the Justizforum extended it northwest into a double square; the western part became Sievekingplatz in 1912. The eastern part was renamed Karl-Muck-Platz in 1934 and Johannes-Brahms-Platz in 1997, the centenary of Brahms's death.

The square's name honours Johannes Brahms, born in Hamburg in 1833; it was given in 1997, the centenary of his death, replacing the earlier name Karl-Muck-Platz. The Laeiszhalle on the north side is the city's main concert hall, so concertgoers cross the square before and after performances.

The square connects easily to public transport, with the U2 metro line serving Messehallen station and several bus routes nearby. Visitors should expect the area to be more active before and after concert events at the hall.

The square was laid out in 1859 as the exit from the city through the Holstentor gate, and the gate became redundant as early as 1861 when the gate curfew was abolished. The name Holstenplatz outlasted it by decades. The eastern half kept that name until 1934, when it was renamed after the conductor Karl Muck.