In 1919, Mogilev Governorate was abolished, and Mstislavsky Uyezd was transferred to Smolensk Governorate. On 3 March 1924, a half of Mstislavsky Uyezd was transferred to Byelorussian Soviet Socialist Republic, and seven volosts, including Khislavichi, were left in Smolensk Governorate.[11]
On 12 July 1929, governorates and uyezds were abolished, and Khislavichsky District with the administrative center in the settlement of Khislavichi was established. The district belonged to Roslavl Okrug of Western Oblast. On August 1, 1930, the okrugs were abolished, and the districts were subordinated directly to the oblast. In 1935, Khislavichi was granted urban-type settlement status.[2] On 27 September 1937 Western Oblast was abolished and split between Oryol and Smolensk Oblasts. Khislavichsky District was transferred to Smolensk Oblast.[12]
The German Army entered Khislavichi on July 16, 1941. 800 Jews of the town were resettled in a ghetto. In September or October 1941, 120 to 150 Jews were murdered in a mass execution.[13] On March 20, 1942, the Hilfspolizei entered the ghetto. Under the command of the Einsatzgruppen, they killed all the Jews of the ghetto about 150 meters northwest of the town in a ditch near the local machine and tractor station.[14][15]
In 1963, during the Khrushchyov administrative reform, Khislavichsky District was merged into Monastyrshchinsky District. In 1965, it was re-established.[12]
Khislavichi is on a main road which connects Pochinok with Mstsislaw, where it continues to Orsha and Krychaw. In Khislavichi, another road branches northwest to Monastyrshchina. There are also local roads with bus traffic originating from Khislavichi.
^Федеральная служба государственной статистики. Федеральное агентство по технологическому регулированию и метрологии. №ОК 033-2013 1 января 2014 г. «Общероссийский классификатор территорий муниципальных образований. Код 66 652 151 051». (Federal State Statistics Service. Federal Agency on Technological Regulation and Metrology. #OK 033-2013 January 1, 2014 Russian Classification of Territories of Municipal Formations. Code 66 652 151 051. ).
^"Об исчислении времени". Официальный интернет-портал правовой информации (in Russian). 3 June 2011. Retrieved 19 January 2019.
^Почта России. Информационно-вычислительный центр ОАСУ РПО. (Russian Post). Поиск объектов почтовой связи (Postal Objects Search) (in Russian)
Администрация Смоленской области. Постановление №261 от 30 апреля 2008 г. «Об утверждении реестра административно-территориальных единиц и территориальных единиц Смоленской области», в ред. Постановления №464 от 27 июня 2014 г. «О внесении изменений в реестр административно-территориальных единиц и территориальных единиц Смоленской области». Опубликован: База данных "Консультант-плюс". (Administration of Smolensk Oblast. Resolution #261 of April 30, 2008 On the Adoption of the Registry of the Administrative-Territorial Units and Territorial Units of Smolensk Oblast, as amended by the Resolution #464 of June 27, 2014 On Amending the Registry of the Administrative-Territorial Units and Territorial Units of Smolensk Oblast. ).
Смоленская областная Дума. Закон №110-з от 20 декабря 2004 г. «О наделении статусом муниципального района муниципального образования "Хиславичский район" Смоленской области, об установлении границ муниципальных образований, территории которых входят в его состав, и наделении их соответствующим статусом», в ред. Закона №164-з от 26 декабря 2013 г. «О внесении изменений в отдельные областные Законы». Вступил в силу со дня официального опубликования. Опубликован: "Вестник Смоленской областной Думы и Администрации Смоленской области", №13, часть II, стр. 238, 22 декабря 2004 г. (Smolensk Oblast Duma. Law #110-z of December 20, 2004 On Granting the Status of the Municipal District to the Municipal Formation of "Khislavichsky District" of Smolensk Oblast, on Establishing the Borders of the Municipal Formations the Territories of Which It Comprises, and on Granting Them Appropriate Status, as amended by the Law #164-z of December 26, 2013 On Amending Various Oblast Laws. Effective as of the official publication date.).