Corn Buntings breed from the Canaries and northwest Africa north through much of southern and western Europe to the southern shores of the Baltic, thence east through south Russia, Asia Minor and parts of the Middle East to Iran, Kazakhstan and northwest China. In Europe they are still common in the south but have declined drastically in countries such as Denmark, Germany - and Great Britain.
    In Britain Corn Buntings' numbers fell by 60% between 1970 and 1990 and by a further 24% between 1995 and 2018. Bird Atlas 2007-11 recorded range reductions of 56% in the British breeding season since the 1968-72 Breeding Atlas and of 27% in the winter since the 1981-84 Winter Atlas. Losses in southern Scotland, northern England and the English midlands have reduced the remaining populations largely to discrete areas, in particular of chalk grasslands.
    In the 19th century Corn Buntings were common and widespread in Wiltshire and they have continued to prosper on the county's chalk uplands whilst declining elsewhere. Birds of Wiltshire recorded them in 295 tetrads, with breeding in 160. WTA2 recorded them in 285 tetrads, with breeding in 141.

The following references are used throughout these species accounts, in the abbreviated form given in quotation marks:
1968-72 Breeding Atlas” – Sharrack, J.T.R. 1976:  The Atlas of Breeding Birds in Britain and Ireland. T. & A. Poyser
1981-84 Winter Atlas” – Lack, P.C. 1986:  The Atlas of Wintering Birds in Britain and Ireland. T. & A. Poyser
“1988-91 Breeding Atlas” – Gibbons, D.W., Reid, J.B. & Chapman, R.A. 1993: The New Atlas of Breeding Birds in Britain and Ireland 1988-91. T. & A. Poyser
Birds of Wiltshire” – Ferguson-Lees, I.J. et al. 2007 : Birds of Wiltshire, published by the tetrad atlas group of the Wiltshire Ornithological Society after mapping fieldwork 1995-2000. Wiltshire Ornithological Society.
Bird Atlas 2007-2011” – Balmer, D.E., Gillings, S., Caffrey, B.J., Swann, R.L., Downie, I.S. and Fuller, R.J. 2013: Bird Atlas 2007-2011: the Breeding and Wintering Birds of Britain and Ireland
WTA2” – ("Wiltshire Tetrad Atlas 2 ") the present electronic publication, bringing together the Wiltshire data from “Birds of Wiltshire” and “Bird Atlas 2007-11”, together with data from further fieldwork carried out in 2011 and 2012.
"Hobby" - the annual bird report of the Wiltshire Ornithological Society.