Arthur Goldstein (18 March 1887 in , Germany – 1943 in Auschwitz, Poland) was a German journalist and communist politician.
Goldstein joined the Social Democratic Party of Germany (SPD) in 1914, and was considered part of its left wing. As such, he joined the Independent Social Democratic Party of Germany (USPD) in 1917, and later the Spartacus League, and was a founding member of the Communist Party of Germany (KPD). There he was a supporter of anti-parliamentarian positions, and in 1920 was a co-founder of the Communist Workers' Party of Germany (KAPD) and was its representative for a while on the Executive Committee of the Communist International in Moscow, and was also responsible, along with Karl Schröder and Adolf Dethmann for the party newspaper Kommunistische Arbeiter-Zeitung. Under the pseudonym "Stahl" (steel) he was one of the signatories to the manifesto of the KAPD, which was drafted by Herman Gorter. The first executive committee of the KAPD consisted of Emil Sachs ("Erdmann"), Friedrich Wendel ("Friedrich") and Arthur Goldstein ("Stahl"). Together with Schröder and Dethmann, Goldstein was a vigorous opponent of the Hamburg Faction and their supporters in the KAPD, Heinrich Laufenberg and Fritz Wolffheim, who advocated for a national communism. At the second party congress of the KAPD from 1–4 August 1920 in Berlin-Weißensee, Goldstein argued successfully for separation from the Hamburger Faction. The 2nd World Congress of the Comintern in July/August 1920 accepted the KAPD as a member, but it left already in September 1921.