Charles Carroll Soule (June 25, 1842 – January 7, 1913) was an American bookman with a side specialty in the architecture of libraries.

Born in Boston to Richard Soule Jr. (1812–1877) and Harriet Winsor (1816–1905)[1] he attended the Boston Latin School and Harvard College (1862), and fought in the Civil War (44th and 55th Regiment Massachusetts Volunteer Infantries).

[2] After the war he engaged in public speaking about post-slavery reconciliation in Orangeburg County, South Carolina.

[3] In the 1870s he worked in St. Louis in the publishing firm of Soule, Thomas & Winsor.

[4][5] In the 1880s he ran a business selling law books from offices in Pemberton Square, Boston,[6] and in 1886 opened a bookshop in a former church on Beacon Street, near the Boston Athenaeum.