- Aug 4 James Springer White, American theologian (co-founder of the Seventh-day Adventist Church), born in Palmyra, Maine (d. 1881)
Louis Vuitton (1821-1892)
Aug 4 French founder of the Louis Vuitton brand of leather goods now owned by LVMH, born in Anchay, France
- Aug 10 Jay Cooke, American financier (d. 1905)
- Aug 14 Clement H. Stevens, American Brigadier General (Confederate Army), born in Norwich, Connecticut (d. 1864)
- Aug 21 William Barksdale, American Brigadier General (Confederate Army), born in Smyrna, Tennessee (d. 1863)
- Aug 24 Emanuele Muzio, Italian composer, born in Zibello, Italy (d. 1890)
- Aug 29 Louis Laurent Gabriel de Mortillet, French anthropologist who was the first to organize and classify Stone Age cultures into a chronological sequence of epochs, born in Meylan, France (d. 1898)
- Aug 30 Anita Garibaldi, Brazilian warrior; Garibaldi's wife (War of Tatters), born in Laguna, Santa Catarina, Brazil (d. 1849)
- Aug 31 Hermann von Helmholtz, German physician and physicist, born in Potsdam, Kingdom of Prussia (d. 1894)
- Aug 31 Vaclav Hugo Zavrtal, Bohemian clarinetist, band leader, and composer, born in Polepy, Austrian Empire (now Czech Republic) (d. 1899)