To assess COVID-19 vaccination rates in ICU-healthcare providers (HCPs) in France and to identify the typology of those who delayed or declined vaccination. Cross-sectional study. Twenty-one ICUs in France. Members of the nursing and medical staff and other allied professionals. None. Six hundred ninety-six of the 950 respondents (73.3%) had undergone a full vaccination schedule. Other HCPs either declined vaccination ( n = 112) or delayed vaccination until it became mandatory ( n = 142). Factors independently associated with full vaccination were age older than 50 years (odds ratio, 0.25 [95% CI, 0.12-0.51]), more than 5 years of ICU experience (0.66 [0.47-0.93]), increasing working time during the surge (0.94 [0.88-1.00]), and spending time with the family (0.92 [0.85-0.99]). Conversely, being a nurse (1.94 [1.25-2.99]) or a nurse assistant (2.77 [1.62-4.73]), and feeling not supported by hospital and ICU directors (1.49 [1.01-2.20]) was independently associated with not being vaccinated. These results are important to take into account to better implement vaccination strategies in HCPs for existing or future pandemics.