Editing Shimane Prefecture (section)

===Mergers===
{{Main|List of mergers in Shimane Prefecture}}

{| class="wikitable"
|+ 
! !! colspan="2"|  April 1976 !! January 2011 !! January 2012
|-
! rowspan="29" | Izumo Region
| style="text-align: center;" colspan="2"| Matsue City (Old System) || rowspan="8" | Matsue City (New System) || style="text-align: center;"  rowspan="9" | Matsue City<br/> (August 1, 2011 Merger with Higashiizumo Town)
|-
| rowspan="8" | Yatsuka District || Kashima Town 
|-
| Shimane Town
|-
| Mihonoseki Town
|-
| Yakumo Village
|-
| Tamayu Town
|-
| Shinji Town
|-
| Yatsuka Town
|-
| style="text-align: center;" colspan="2"|  Higashiizumo Town
|-
| style="text-align: center;"  colspan="2"| Yasugi City (Old System) || rowspan="3" | Yasugi City (New System) || style="text-align: center;"  rowspan="3" | Yasugi City
|-
| rowspan="2" | Nogi District || Hirose Town 
|-
| Hakuta Town 
|-
| rowspan="2" | Nita District || Yokota Town || style="text-align: center;"  rowspan="2" colspan="2"|  Okuizumo Town
|-
| Nita Town
|-
| style="text-align: center;" colspan="2"| Izumo City (Old System) || rowspan="6" | Izumo City (New System) || style="text-align: center;"  rowspan="7" | Izumo City<br/> (October 1, 2011 Merger with Hikawa Town)
|-
| style="text-align: center;" colspan="2"| Hirata City
|-
| rowspan="5" | Hikawa District || Taisha Town
|-
| Koryo Town
|-
| Taki Town
|-
| Sada Town
|-
| style="text-align: center;" colspan="2"|  Hikawa Town
|-
| rowspan="3" | Ōhara District || Daitō Town || style="text-align: center;"  rowspan="6" colspan="2"| Unnan City
|-
| Kamo Town
|-
| Kisuki Town
|-
| rowspan="5" | Iishi District || Mitoya Town
|-
| Kakeya Town
|-
| Yoshida Village
|-
| Tonbara Town  || style="text-align: center;"  rowspan="2" colspan="2"|  Iinan Town
|-
| Akagi Town
|-
! rowspan="23" | Iwami Region
| style="text-align: center;" colspan="2"| Ōda City (Old System) || rowspan="3" | Ōda City (New System) || style="text-align: center;"  rowspan="3" | Ōda City
|-
| rowspan="2" | Nima District || Yunotsu Town
|-
| Nima Town 
|-
| style="text-align: center;" colspan="2"| Gōtsu City (Old System) || rowspan="2" | Gōtsu City (New System) || style="text-align: center;"  rowspan="2" | Gōtsu City
|-
| rowspan="7" | Ōchi District || Sakurae Town
|-
| Ōchi Town || style="text-align: center;" rowspan="2" colspan="2"| Misato Town
|-
| Daiwa Village
|-
| Iwami Town || style="text-align: center;" rowspan="3" colspan="2"| Ōnan Town
|-
| Mizuho Town
|-
| Hasumi Village
|-
| style="text-align: center;" colspan="4"| Kawamoto Town
|-
| style="text-align: center;" colspan="2"| Hamada City (Old System) || rowspan="5" | Hamada City (New System) || style="text-align: center;"  rowspan="5" | Hamada City
|-
| rowspan="4" | Naka District || Asahi Town
|-
| Kanagi Town
|-
| Misumi Town
|-
| Yasaka Village
|-
| style="text-align: center;" colspan="2"| Masuda City (Old System) || rowspan="3" | Masuda City (New System) || style="text-align: center;"  rowspan="3" | Masuda City
|-
| rowspan="2" | Mino District || Mito Town
|-
| Hikimi Town
|-
| rowspan="4" | Kanoashi District || Tsuwano Town (Old System) || rowspan="2" | Tsuwano Town (New System) || style="text-align: center;"  rowspan="2" | Tsuwano Town
|-
| Nichihara Town
|-
| Muikaichi Town || style="text-align: center;"  rowspan="2" colspan="2"| Yoshika Town
|-
| Kakinoki Village
|-
! rowspan="7" | Oki Region
| rowspan="7" | Oki District || Saigō Town || style="text-align: center;"  rowspan="4" colspan="2"| Okinoshima Town
|-
| Fuse Village
|-
| Goka Village
|-
| Tsuma Village
|-
| style="text-align: center;" colspan="4"| Nishinoshima Town
|-
| style="text-align: center;" colspan="4"| Ama Town
|-
| style="text-align: center;" colspan="4"| Chibu Village
|}