Thomas Affleck (July 13, 1812 – December 30, 1868) was a Scottish-American nurseryman, almanac editor, and agrarian writer and Southern plantation owner.

[1] In the mid-1850s, Affleck purchased Glenblythe Plantation in Gay Hill, Washington County, Texas, where he, his family, and enslaved people moved in 1860.

[1] He was the first Southern writer whose work on plants was widely read; he also published two best-selling guides for cotton and sugar plantation and farming accounting.

Most agricultural and gardening advice had previously been written by authorities from Europe or the Northern United States.

[3] He married Anna Dunbar Smith, the niece of Jane Herbert Wilkinson Long (1798–1880), on April 19, 1842, in Washington, Mississippi.

[11] Affleck died on December 30, 1868, on the Glenblythe Plantation in Gay Hill, Washington County, Texas.