Brokdorf is a municipality in the district of Steinburg, in Schleswig-Holstein, Germany.

The planning for a light-water nuclear power reactor at Brokdorf, 45 miles northwest of Hamburg, began in the late 1960s, and concerns about the Brokdorf Nuclear Power Plant proposal became a public issue in November 1973, when several nuclear power reactors were already operating in Germany. During construction in the 1970s and 1980s there were violent protests about Brokdorf by opponents. The largest onsite demonstrations were in November 1976, February 1977, January 1981 and June 1986.