Alexander Schwab (5 July 1887 – 12 November 1943) was a German political activist.
He withdrew from active participation in politics after resigning from the fractious and short-lived Communist Workers' Party ("Kommunistische Arbeiter-Partei Deutschlands" / KAPD) in 1922, but continued his contribution as an independent left of centre commentator-journalist.
During the twelve Nazi years he was arrested at least twice, spending the final years of his life, between 1936 and 1943, in a succession of jails.
Sources may also identify him by the pseudonym under which some of his contributions were published, as Albert Sigrist Sachs.