Bulletin 2026-09UCDP data through GED 26.1, Candidate Events 26.0.9Changes in the data

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Events and deaths in organized violence, as UCDP records them

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Sumy oblast, Ukraine: events and estimated deaths recorded by UCDP

Data through Name of the region as UCDP writes it: Sumy oblastPopulation about 1,035,772 (Wikidata)

UCDP recorded 19 eventsP of organized violence in Sumy oblast, Ukraine in September 2026. The best estimate of deaths in these events is 31P. The low estimate is 30 and the high estimate is 31P. The count for August 2026 was 24 eventsP.

In the 12 months to 30 Sep 2026, UCDP recorded 310 eventsP in Sumy oblast, Ukraine. The best estimate of deaths in the events of the 12 months is 576P. The low estimate is 506 and the high estimate is 813P. UCDP counts 219P of these deaths as deaths of civilians.

Among the 16 regions of Ukraine with a page, Sumy oblast has the 6th highest count of events in the 12 months to 30 Sep 2026. Sumy oblast holds 7 percentP of the events that UCDP recorded in Ukraine in the 12 months to 30 Sep 2026. In the 12 months to 30 Sep 2025, UCDP recorded 362 events in Sumy oblast. The count for the 12 months to 30 Sep 2026 is 310P, which is down 14 percent. Over the same periods, the count for Ukraine as a whole went from 6,902 to 4,642P, which is down 33 percent. For the events in Sumy oblast, the three types of violence have shares within 5 points of the shares for Ukraine.

Table 1. Sumy oblast, Ukraine: events and estimated deaths that UCDP records
FigureSeptember 2026PAugust 2026P12 months to 30 Sep 2026P
Events1924310
Estimated deaths, best estimate3131576
Low estimate of deaths3031506
High estimate of deaths3131813
Deaths of civilians3130219

P Preliminary. The figure is from UCDP Candidate Events, and UCDP revises these events.

Not all events in UCDP Candidate will make it into the final UCDP GED and new events will be added. The UCDP Candidate is a dataset containing events that have a high probability of being included in the final annual version of UCDP GED.

An incident where armed force was used by an organized actor against another organized actor, or against civilians, resulting in at least 1 direct death at a specific location and a specific date

UCDP's words. Source: UCDP Candidate Events Dataset Codebook, version 1.5 (Introduction) and UCDP GED Codebook, version 26.1 (section 2, the definition of an event), copied on .

This page rests on UCDP GED 26.1 and UCDP Candidate Events 26.0.9, with data through . The figures from January 2026 are from Candidate Events. Candidate Events are preliminary and UCDP revises them.

The pages give counts and their sources. They give no travel, security or safety advice. A count of events is not a measure of danger.

Since the last update

ConflictStats recorded this on .

  • UCDP recorded 19 events in Sumy oblast, Ukraine, in September 2026 (preliminary). The count for August 2026 was 24 (preliminary).

All changes recorded on 28 Oct 2026

24 months

050100Jan 2025Jan 2026GEDCandidate
Figure 1. Events in Sumy oblast by month. A hollow column is a preliminary month. The line marks the change of dataset: GED to the left, Candidate Events from Jan 2026 to the right. The two datasets are not made in the same way, so a step at the line is not only a change in the events. The figures are in Table 5.
Figure 2. Events in Sumy oblast, 1 Oct 2025 to 30 Sep 2026. The map shows 310 events with 576 estimated deaths. One dot is one event at the place that UCDP gives. When a source names no exact place, UCDP puts the event at the centre of a region or of the country. The area of a dot follows the best estimate of deaths. The largest dot is for 330 deaths or more.1 death10 deaths100 deathsOutlines: Natural Earth, with the first-level areas of the UCDP data. An outline shows where the events are. It is not a statement about a border.

Actors, as UCDP names them

Names as UCDP writes them.

Table 2. Sumy oblast: actors, as UCDP names them, in the events of the 12 months to 30 Sep 2026, in name order
Name, as UCDP writes itEventsEstimated deaths in these events
Government of Russia (Soviet Union)310P576P
Government of Ukraine310P576P

An event has two sides, so one event can be in two rows. The deaths are the deaths in the events of a side. The table does not say which side caused a death.

P Preliminary. The figure is from UCDP Candidate Events, and UCDP revises these events.

Second-level areas

The areas in Sumy oblast that UCDP names in the events. The table has 10 areas at most.

Table 3. Second-level areas of Sumy oblast in the events of the 12 months to 30 Sep 2026, in name order
Area, as UCDP writes itEventsEstimated deaths
Konotop raion14P16P
Okhtyrska raion30P34P
Romny raion4P8P
Shostkynskyi raion51P72P
Sumy raion159P346P

P Preliminary. The figure is from UCDP Candidate Events, and UCDP revises these events.

Type of violence

Table 4. Sumy oblast: events by type of violence, the 12 months to 30 Sep 2026
Type of violenceEventsShare of events
State-based armed conflict310P100%
Non-state conflict00%
One-sided violence against civilians00%

P Preliminary. The figure is from UCDP Candidate Events, and UCDP revises these events.

The glossary has the UCDP definition of each type.

Monthly reports

One report for each month with events. Search engines list a report of a month in the last 12 months that has 30 or more events.

Table 5. Monthly reports of Sumy oblast, newest first: events and estimated deaths
MonthEventsEstimated deathsDataset
September 202619P31PCandidate Events
August 202624P31PCandidate Events
July 202615P33PCandidate Events
June 202625P30PCandidate Events
May 202620P29PCandidate Events
April 202621P101PCandidate Events
March 202614P17PCandidate Events
February 202618P30PCandidate Events
January 202615P24PCandidate Events
December 20254581GED
November 20253766GED
October 202557103GED
September 202565120GED
August 202552159GED
July 202550184GED
June 202528243GED
May 202541214GED
April 202539174GED
March 20252849GED
February 20251118GED
January 2025825GED
December 20242242GED
November 20241036GED
October 2024813GED
September 20242451GED
August 20242127GED

P Preliminary. The figure is from UCDP Candidate Events, and UCDP revises these events. Search engines list a report of a month in the last 12 months that has 30 or more events. The other reports stay online and ask search engines not to list them.

Ukraine: all figures

Official channels

These links go to the sites of the organisations. The UCDP and World Bank links were checked on .

Cite and download

ConflictStats. Sumy oblast, Ukraine: events and estimated deaths recorded by UCDP. https://conflictstats.com/country/ukraine/sumy-oblast/. Source: Uppsala Conflict Data Program, UCDP GED 26.1 and UCDP Candidate Events 26.0.9. Data through .

The address of this page does not change. UCDP asks for a citation of its publications: Data sources and licences has it.

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Questions

How many events did UCDP record in Sumy oblast, Ukraine in September 2026?

UCDP recorded 19 eventsP of organized violence in Sumy oblast, Ukraine in September 2026. The count for August 2026 was 24 eventsP.

How does UCDP count deaths?

UCDP gives a best estimate, a low estimate and a high estimate for each event. This page uses the best estimate. For Sumy oblast, Ukraine in the 12 months to 30 Sep 2026, the best estimate is 576P. The low estimate is 506 and the high estimate is 813P.

Are the figures of the latest months final?

No. The figures from January 2026 are from UCDP Candidate Events. Candidate Events are preliminary and UCDP revises them. UCDP releases the reviewed dataset, the GED, one time each year.