Named after the Heidelberger Platz, which is named after Heidelberg.
The triangular square at the northern end of the Rheingauviertel was named in 1892 after the city of Heidelberg in Baden-Württemberg. The U-Bahn station opened under this name in 1913. The Ring station, opened in 1883 as Schmargendorf, only took the name when it reopened in 1993.