To conduct the research, we used the data from the Central Election Commission's website (section "election results"). We also used the programming language R for analytical processing. To create tables of summarized values by types of polling stations, we used the PLYR package. Graphics were created with the help of basic functions of the R.

  After conduction of long-term observations during three last election campaigns, Civic Network OPORA in Dnipropetrovsk oblast can make a conclusion that members of precinct election commissions have poor knowledge about regulations on electoral process. During the last election of the President of Ukraine, candidates' headquarters were known of their legal nihilism in election procedures, election commissions badly organized the electoral process, and precinct election commissions impl...

A criminal case was initiated against Mykhailo Kumok, who voted for him and his wife at the polling station #230725 during the presidential election in Melitopol on 25 May. 

  Petro Poroshenko has won in all election districts besides ED #178, centered in city of Chuhuiv (Kharkiv oblast). Mykhailo Dobkin has won there with 33.73%. Poroshenko goes second with 27.17%.

Gunmen of the "DPR" attacked the election commission #43 two times. On 22 May, during the first visit, terrorists took the equipment and documentation, during the second — personal things of commission members and Ruslan Kudriavtsev, the Head of DEC.

During the observation of the voting process and vote count, OPORA's observers reported mostly procedural violations in Ivano-Frankivsk oblast. However, the number and types of violations didn't threaten the organization of voting process, they were not widespread, and couldn't have influence on voting results. 

More than 66% of voters participated in the election process in Zhytomyr oblast. In general, the voting was held without major violations, which could have result in falsification of the election results.

In contrast to the regular polling stations, Yuliia Tymoshenko is winning Petro Poroshenko in penitentiary institutions.

  During the elections of the President of Ukraine, 16 administrative violations related to the election process were reported in Khmelnytsk oblast. This number is ten times smaller than during Parliamentary elections in 2012. Deputy Chairman of the MIAU Roman Havryliuk has provided such information during a briefing in the Oblast Department of the MIAU.