KIIS
KIIS (Kyiv International Institute of Sociology) is a Ukrainian non-governmental sociological research organization founded in 1992. It is one of the most cited polling bodies in Ukraine, conducting regular public opinion surveys on political, social, and economic issues. Its director is Mykhailo Mishchenko, a sociologist who has led the institute for many years. KIIS is widely referenced for national and regional polling on topics including trust in government, attitudes toward the war, and electoral preferences.
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KIIS poll: Zelensky trust jumped mid-survey after US pressure, monthly level unchanged
A Kyiv International Institute of Sociology (KIIS) telephone poll conducted October 8–16, 2026 found that 54% of Ukrainian citizens trust President Volodymyr Zelensky and 41% do not. KIIS said these monthly figures were identical to those from late August to early September, but that trust rose sharply during the survey window: 43% among respondents polled October 8–9 versus 57% among those polled October 10–16. KIIS Executive Director Anton Hrushetsky attributed the shift to a "rally-around-the-flag" effect triggered by US pressure on Ukraine.
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KIIS poll: trust in Zelensky jumped after US–Russia diesel deal
A Kyiv International Institute of Sociology poll found that 54% of Ukrainians trust President Volodymyr Zelensky after a US–Russia agreement easing sanctions on Russian diesel fuel. KIIS attributed the rise in part to a rally-around-the-flag effect following US pressure on Ukraine, but said it is unknown how long that effect could last.