Search the JewishGen Database for all records pertaining to Chornyi Ostriv*
(requires login to JewishGen)
*This queries the database for all records mentioning Chornyi Ostriv instead of just Ukraine; this is because there are relevant records of people from Chornyi Ostriv in Bessarabia/Transnistria, Poland, Latin America, Russia, United States, and the JewishGen Holocaust Databases.
The TFK Archives website is a mix of records, specific family histories, as well as archives of the former Soviet Union. It also links to other archives from all around Eastern Europe.
A collection of testimonies and records linked to this town during the Holocaust. This link will take you to a general search of Chornyi Ostrov collections on the Yad Vashem website. From there you can narrow the results down to names and many other factors.
The YAHAD - IN UNUM website has a summary of the events that happened in Chornyi Ostriv beginning on July 7, 1941 until September of 1942, as well as pictures of the location.
Jewish Pogroms is a site dedicated to victims of the pogroms during the first World War and Russian Revolution.
Chornyi Ostriv is in the "City" drop down list with three different spellings - Cherno-Ostrov, Chernoostrov, and Chernyy Ostrov; each must be run individually.
Chornyi Ostriv is located very close to the Polish border and prior to 1793 was part of Poland. It is worth checking JRI-Poland's database. You can search the whole database or narrow your search to the nearest subregion - Volhynia Gubernia, in the Russian Pale.
Genealogy Indexer is a database of historical directories [business, address, telephone, mostly Central + Eastern European], yizkor books, military lists, school sources, and community histories. The "Place" option has the Russian Empire, Ukraine, or even Podolia Gubernia.
*The site is in English but many of the record descriptions are in Ukrainian; use your web browser to translate the results.