From September 2 to 14, 2025, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion survey "Omnibus", to which, on its own initiative, added questions related to language policy in Ukraine. By the method of telephone interviews (computer-assistedtelephoneinterviews, CATI) based on a random sample of mobile phone numbers (with random generation of phone numbers and subsequent statistical weighting) in all regions of Ukraine (the territory controlled by the Government of Ukraine), 2,012 respondents were surveyed. The survey was conducted with adult (aged 18 and older) citizens of Ukraine who, at the time of the survey, lived in the territory of Ukraine controlled by the Government of Ukraine. The sample did not include residents of territories temporarily not controlled by the Ukrainian authorities (at the same time, some of the respondents are IDPs who moved from the occupied territories), and the survey was not conducted with citizens who left abroad after February 24, 2022.

Formally, under normal circumstances, the statistical error of a sample of 2012 respondents (with a probability of 0.95 and taking into account the design effect of 1.3) does not exceed 2.9%. In this case, we implemented an experiment and the respondent was read one of three randomly selected language policy options (to avoid the effect of the order of responses). Each peace plan was evaluated by about 666-675 respondents, which gives an error (with a probability of 0.95 and taking into account the design effect of 1.3) of no more than 5.1%.

Under conditions of war, in addition to the specified formal error, a certain systematic deviation is added. Factors that may affect the quality of results in "wartime" conditions were previously cited by KIIS.

In general, we believe that the obtained results are still highly representative and allow a fairly reliable analysis of the public moods of the population.

From February 14 to March 4, 2025, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion survey "Omnibus", to which, on its own initiative, it added a question about the attitude towards studying the Russian language in schools. By the method of telephone interviews (computer-assistedtelephoneinterviews, CATI) based on a random sample of mobile phone numbers (with random generation of phone numbers and subsequent statistical weighting) in all regions of Ukraine (the territory controlled by the Government of Ukraine), 1,029 respondents were surveyed. The survey was conducted with adult (aged 18 and older) citizens of Ukraine who, at the time of the survey, lived in the territory of Ukraine controlled by the Government of Ukraine. The sample did not include residents of territories temporarily not controlled by the Ukrainian authorities (at the same time, some of the respondents are IDPs who moved from the occupied territories), and the survey was not conducted with citizens who left abroad after February 24, 2022.

Formally, under normal circumstances, the statistical error of such a sample (with a probability of 0.95 and taking into account the design effect of 1.3) did not exceed 4.1% for indicators close to 50%, 3.5% for indicators close to 25%, 2.5% for indicators close to 10%, 1.8% for indicators close to 5%.

Under the conditions of war, in addition to the specified formal error, a certain systematic deviation is added. Factors that may affect the quality of results in "wartime" conditions were previously cited by KIIS.

In general, we believe that the obtained results are still highly representative and allow a fairly reliable analysis of the public moods of the population.

During February 17-23, 2024, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion survey "Omnibus". Bythemethodofcomputer-assistedtelephoneinterviews(CATI) based on a random sample of mobile phone numbers (with random generation of phone numbers and subsequent statistical weighting), 1,052 respondents living in all regions of Ukraine (except AR of Crimea) were interviewed. The survey was conducted with adult (aged 18 and older) citizens of Ukraine who, at the time of the survey, lived on the territory of Ukraine controlled by the Government of Ukraine. The sample did not include residents of territories temporarily not controlled by the authorities of Ukraine, and the survey was not conducted with citizens who went abroad after February 24, 2022.

Formally, under normal circumstances, the statistical error of such a sample (with a probability of 0.95 and taking into account the design effect of 1.1) did not exceed 3.4% for indicators close to 50%, 3.0% for indicators close to 25%, 2.1% - for indicators close to 10%, 1.5% - for indicators close to 5%.

Under conditions of war, in addition to the specified formal error, a certain systematic deviation is added. In particular, if in May 2022, among all the respondents we interviewed, 2.5-4% lived in the territories occupied after February 24 (and this corresponded to the percentage of those who live there, because the generation of telephone numbers was random), now due to the occupiers turning off the telephone connection, not a single respondent who currently lives in occupied settlements was included in the sample (along with this, out of a total of 1,052 respondents, 33 respondents lived in a settlement that is currently occupied until February 24, 2022). It is important to note that although the views of the respondents who lived in the occupation were somewhat different, the general trends were quite similar. That is, the impossibility of interviewing such respondents does not significantly affect the quality of the results. There are other factors that can affect the quality of results in "wartime" conditions, which were cited by KIIS earlier.

In general, we believe that the obtained results are still highly representative and allow for a fairly reliable analysis of the public moods of the population.

We present the data of the survey conducted two months ago (the analysis of the survey results takes some time). From September 29 to October 9, 2023, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion survey "Omnibus". Bythemerhodofcomputer-assistedtelephoneinterviews(CATI) based on a random sample of mobile phone numbers (with random generation of phone numbers and subsequent statistical weighting), 1,010 respondents living in all regions of Ukraine (except AR of Crimea) were interviewed. The survey was conducted with adult (aged 18 and older) citizens of Ukraine who, at the time of the survey, lived on the territory of Ukraine (within the boundaries controlled by the Ukrainian authorities until February 24, 2022). The sample did not include residents of territories that were not temporarily controlled by the authorities of Ukraine until February 24, 2022 (AR of Crimea, Sevastopol, certain districts of Donetsk and Luhansk oblasts), and the survey was not conducted with citizens abroad.

Formally, under normal circumstances, the statistical error of such a sample (with a probability of 0.95 and taking into account the design effect of 1.1) did not exceed 3.4% for indicators close to 50%, 3.0% for indicators close to 25%, 2.1% - for indicators close to 10%, 1.5% - for indicators close to 5%.

Under conditions of war, in addition to the specified formal error, a certain systematic deviation is added. KIIS previously cited factors that can affect the quality of results in "wartime" conditions.

In general, we believe that the obtained results are still highly representative and allow for a fairly reliable analysis of public moods of the population.

From May 26 to June 5, 2023, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion survey "Omnibus". Bythemethodofcomputer-assistedtelephoneinterviews(CATI) based on a random sample of mobile phone numbers (with random generation of phone numbers and subsequent statistical weighting), 984 respondents living in all regions of Ukraine (except the Autonomous Republic of Crimea) were interviewed. The survey was conducted with adult (aged 18 and older) citizens of Ukraine who, at the time of the survey, lived on the territory of Ukraine (within the boundaries controlled by the authorities of Ukraine until February 24, 2022). The sample did not include residents of territories that were not temporarily controlled by the authorities of Ukraine until February 24, 2022 (AR of Crimea, the city of Sevastopol, certain districts of the Donetsk and Luhansk oblasts), and the survey was not conducted with citizens who left the country after February 24, 2022 .

Formally, under normal circumstances, the statistical error of such a sample (with a probability of 0.95 and taking into account the design effect of 1.1) did not exceed 3.4% for indicators close to 50%, 3.0% for indicators close to 25%, 2.1% - for indicators close to 10%, 1.5% - for indicators close to 5%.

Under conditions of war, in addition to the specified formal error, a certain systematic deviation is added. In particular, if in May 2022, among all the respondents we interviewed, 2.5-4% lived in the territories occupied after February 24 (and this corresponded to the percentage of those who live there, because the generation of telephone numbers was random), now due to the occupiers turning off the telephone connection, not a single respondent who currently lives in occupied settlements was included in the sample (along with this, out of a total of 984 respondents, 32 respondents lived in a settlement that is currently occupied until February 24, 2022). It is important to note that although the views of the respondents who lived in the occupation were somewhat different, the general trends were quite similar. That is, the impossibility of interviewing such respondents does not significantly affect the quality of the results. There are other factors that can affect the quality of results in "wartime" conditions (see Annex 2).

In general, we believe that the obtained results are still highly representative and allow a fairly reliable analysis of public moods of the population.