Ludwig Lore (June 26, 1875 – July 8, 1942) was an American socialist magazine editor, newspaper writer, lecturer, and politician, best remembered for his tenure as editor of the socialist New Yorker Volkszeitung and role as a factional leader in the early American communist movement. During the middle 1930s, he wrote the daily foreign affairs column "Behind the Cables" for the New York Post. Later still, he was charged with having secretly worked recruiting potential agents and gathering information on behalf of the Soviet foreign intelligence network.

Ludwig Lore was born to working class parents of ethnic Jewish extraction in Friedeberg am Queis in Lower Silesia (now Mirsk, Poland) on June 26, 1875. Lore attended gymnasium in "Hirschberg, (now Jelenia Góra), also in Lower Silesia) and later graduated from Berlin University, where he studied under political economist Werner Sombart. Upon completion of his education in 1892, Lore went to work in the textile industry. He remained in that industry until emigrating to the United States in 1903. While in Germany, Lore joined the Social Democratic Party (SPD) of that country, holding office in the party and standing as an SPD candidate for political office.

Lore emigrated to America in 1903 and first settled in the state of Colorado where he worked at various jobs. While in Colorado, Lore joined the fledgling Industrial Workers of the World.

Lore later moved to New York City where he joined the staff of the German-language socialist daily, the New Yorker Volkszeitung, becoming Associate Editor of the publication within a few years and editor-in-chief during World War I. Under Lore the paper had more the feel of a tabloid magazine than a typical straight newspaper, an orientation which is said by American historian Paul Buhle to have "suited his personality and approach."

Lore did periodically participate in various electoral campaigns of the Socialist Party of America, such as traveling to Altoona, Pennsylvania to address a German-language street meeting in support of the November 1908 Presidential effort of Eugene V. Debs. He appeared in elections in 1914 for the Socialist Party as "Delegate-at-Large to Constitutional Convention." He was also involved in the cooperative movement as a director of the American Wholesale Cooperative Company, formed in Brooklyn in 1910 upon a capital investment of $20,000.

Lore was an early and active opponent of World War I, speaking at an anti-war meeting in New York City in August 1914 that was attended by 4,000 people. Lore shared the platform a host of other prominent socialist leaders, who condemned the war in English, Russian, French, German, Polish, Italian, Hungarian, Yiddish, and Latvian for their international immigrant audience.

With American entry into war in the wind in the spring of 1917, the Socialist Party rushed to hold an Emergency National Convention in St. Louis. Lore was elected as a delegate to this gathering and was chosen as a member of the convention's Platform Committee — although he did not take part in the writing of the party's controversial anti-war statement, remembered as the St. Louis Manifesto.

Following American entry into the war, Lore remained steadfast in his opposition. On May 30 and 31, 1917, the Socialist Party organized an event in New York City touted as the First American Conference for Peace and Democracy, aimed at joining various anti-war groups into a common effort to bring a speedy end to the European conflagration. As an anti-war emigrant from the German empire, Ludwig Lore played a prominent role at this gathering, delivering a speech to the gathering at the first day's session in which he expounded upon the peace efforts being made in Germany by the Social Democratic Party to bring about immediate peace.