The Hundred of Alma is a cadastral unit of hundred located on the northern Adelaide Plains of South Australia spanning the township of Alma and the Alma Plains. The hundred was proclaimed in 1856 in the County of Gawler and named by Governor Richard Graves MacDonnell for the River Alma on the Crimean Peninsula, the location of the Battle of the Alma, the first Allied victory in the Crimean War. The hundred is bounded on the north by the Wakefield River and on the south by the Light River

Alma is a small town in South Australia halfway between the Wakefield River, to the north, and River Light to the south. Alma, Alma South and Alma Plains were named for the cadastral Hundred of Alma in which they lie, which was in turn named after the Battle of the Alma, the site of an allied victory in the Crimean War.