Walnut Grove is a town in Etowah County, Alabama, United States.

[3] From 1880 until the 1960 U.S. Census, with the exclusion of 1890 when no figure was reported, Walnut Grove had the distinction of being the least populated community wholly within Etowah County.

The first college preparatory school for males and females in northeast Alabama was established by act of Legislature in 1884.

The Walnut Grove College closed in 1899 as high schools were being established in Etowah County.

In 1917, the finest grade of magnesium was discovered near Silver Gap at Red Mountain, at the western edge of town.

The magnesium was mined and refined by Bessemer Mills in Birmingham and Eastman Corporation in Kingsport, Tennessee, in the 1930s and 1940s.

The racial makeup of the town was 98.31% White, 0.14% Native American, 0.14% Asian, and 1.41% from two or more races.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.