Heinrich Ferdinand Adolph Schönfelder (1875–1966) was a German politician, Alterspräsident (President by right of age, Father of the House) of the Federal German parliamentary council in 1948–49, mayor of Hamburg, and member of the Hamburg Parliament. Schönfelder was member of the Sozial Democratic Party.
On 23 May 1949 in his position of Alterspräsident, Schönfelder signed the Basic Law for the Federal Republic of Germany together with Konrad Adenauer and Hermann Schäfer.
Schönfelder was honorary citizen of Hamburg, the highest decoration of the city-state.
Basic Law for The Federal Republic of Germany 1949, facsimile of the signatures of Konrad Adenauer (CDU), Adolph Schönfelder (SPD) and Hermann Schäfer (FDP) certifying the original