I. Dialects in Northern Hunan:

1. Changde Dialect
 
2. Yueyang Dialect
 
3. Zhangjiajie Dialect – Southwestern Mandarin, a branch of Northern Dialect Group
 
4. Yiyang Dialect – New Xiang Dialect, a branch of Xiang Dialect
  
II. Dialects in Central Hunan:
 
1. Changsha Dialect – New Xiang Dialect, a branch of Xiang Dialect
 
2. Xiangtan Dialect – with features of both New Xiang and Old Xiang dialects, branches of Xiang Dialect
  
3. Zhuzhou Dialect – New Xiang Dialect, with notable influences from Gan and Hakka dialects
  
4. Loudi Dialect – Old Xiang Dialect, a branch of Xiang Dialect
 
5. Hengyang Dialect – Old Xiang Dialect, strongly influenced by Gan and Southwestern Mandarin dialects
 
6. Shaoyang Dialect – Old Xiang Dialect, with significant influences from Southwestern Mandarin dialect
 
III. Dialects in Southern Hunan:
 
1. Yongzhou Dialect – Southwestern Mandarin, a branch of Northern Dialect Group
  
2. Chenzhou Dialect – Southwestern Mandarin, a branch of Northern Dialect Group, with significant influences from Gan and Hakka dialects
 
IV. Dialects in Western Hunan:
 
1. Jishou Dialect – Southwestern Mandarin, a branch of Northern Dialect Group
  
2. Huaihua Dialect – Southwestern Mandarin, a branch of Northern Dialect Group, with significant influences from Xiang Dialect
 
Appendix: Guiding Principles for Dialect Communication in Hunan
  
1. In the Southwestern Mandarin-speaking areas, spanning from Changde in the north to the urban area of Chenzhou in the south, people can generally communicate with each other, as their dialects are relatively close to modern standard Mandarin.
 
2. In New Xiang Dialect-speaking areas, from Yiyang in the north to Xiangtan in the south, the dialects are also largely mutually intelligible. New Xiang Dialect, deeply influenced by Southwestern Mandarin, is closer to standard Mandarin than Old Xiang or Gan dialects.
 
3. Old Xiang Dialect is particularly hard to understand, retaining many archaic features and varying greatly even over short distances. The Loudi-Shaoyang sub-dialects, in particular, differ considerably from standard Mandarin.
 
4. Gan, Hakka, and local dialects vary remarkably over short distances, with obvious archaic linguistic features. From Yueyang's Linxiang in the north to Chenzhou's Zixing in the south, people can hardly communicate despite their shared dialect group.
 
5. In mountainous areas, dialects necessarily vary greatly over short distances; in plains or lake regions, dialects are essentially consistent.

Chinese source: hunan.gov.cn