Lou Aronica is an American editor and publisher, primarily of science fiction. He co-edited the Full Spectrum anthologies with Shawna McCarthy. As a publisher he began at Bantam Books and formed their Bantam Spectra science fiction and fantasy label. Later he moved on to Avon and helped create their Avon-Eos science fiction and fantasy label.

Lou Berney is an American crime fiction author who has published four books since 2010. For his works, Berney has won multiple awards including an Anthony, Barry and Edgar for The Long and Faraway Gone. With November Road, Berney won the CWA Ian Fleming Steel Dagger while also winning additional Anthony and Barry awards. Apart from writing, Berney was a screenwriter whose written film, Angels Sing, was released in 2012. Berney has also taught at the University of Oklahoma and Oklahoma City University during the 2010s.

Lou Harry is an Indianapolis-based author, journalist, and playwright. The editor of Quill, the magazine of the Society of Professional Journalists, he is host of the podcast Lou Harry Gets Real, which is recorded in front of a live audience. His produced plays include We Are Still Tornadoes, which premiered in August 2018 at Butler University Theatre, and Lightning and Jellyfish, which premiered in October 2014 at Theatre on the Square in Indianapolis.

Louis Adamic was a Slovene-American author and translator, mostly known for writing about and advocating for ethnic diversity of the United States.

Jean Louis Rodolphe Agassiz FRS (For) FRSE was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history.

Louis Albert Banks was an American author and pastor. He was the Progressive nominee for Governor of Massachusetts in 1893.

Louis Pierre Althusser was an Algerian-born French Marxist philosopher who studied at the École normale supérieure in Paris, where he eventually became Professor of Philosophy.

Louis Amédée Eugène Achard was a prolific French novelist.

Louis Ange Pitou was a French author and counterrevolutionary.

Louis Jean Jacques Angely was a German playwright, actor and director, who wrote Possen (farces) and vaudeville after French models, adapted for German audiences.