Nienburg II – Schaumburg is an electoral constituency (German: Wahlkreis) represented in the Bundestag.

In the inaugural Bundestag election, it was Lower Saxony constituency 22 in the numbering system.

Originally, the constituency comprised the districts of Schaumburg-Lippe and Nienburg excluding the Samtgemeinde of Uchte.

In the 1965 through 1976 elections, it comprised the entirety of the districts of Schaumburg-Lippe, Grafschaft Schaumburg, and Neustadt am Rübenberge.

The constituency has been held by the Social Democratic Party (SPD) during all but three Bundestag terms since 1949.

Future President of Germany Gustav Heinemann served one term as representative from 1961 to 1965.

Friedel Schirmer was representative from 1969 to 1983, when the Christian Democratic Union (CDU) candidate Helmut Rode won the constituency.

In 2017, the CDU won the constituency for only the third time in its history; Maik Beermann served as representative.

Yellow background denotes an electorate win by a list member, or other incumbent.