Abstract Background The consequences of obesity stigma, particularly weight discrimination, are widely felt in different sectors of society. Our aim was to examine the prevalence of experiences of weight discrimination in the Finnish adult population. Methods Data (n = 2,849) consisted of participants aged 20-64 years from the nationally representative Healthy Finland Survey in 2023, pregnant women and people with underweight excluded (body mass index, BMI, ≤18.5 kg/m2). The questionnaire inquired about the experiences of weight discrimination with a question “Have you experienced unfair treatment because of your weight during the last 12 months?”. Information on education (low, middle, high) was inquired too. Height and weight were measured during the health examination, and BMI was calculated (kg/m2). Obesity was defined as BMI ≥ 30 kg/m2. Weighted prevalence was analyzed using logistic regression, considering sampling design and non-response. Results Overall, 13% (95% confidence interval, CI, 11-15) of women and 7% (95% CI 5-8) of men had experienced weight discrimination during the last 12 months. The experiences of weight discrimination varied according to BMI, as the prevalence was 27% (95% CI 22-32) among women with obesity vs. 7% (95% CI 6-9) among women without obesity. The corresponding numbers for men were 16% (95% CI 12-20) vs. 4% (95% CI 2-5). The results were similar across all educational classes. Conclusions Individuals with obesity had experienced weight discrimination more often than those without obesity. The problem affects women (in particular), as almost one third of women with obesity had experienced weight discrimination. It is important to raise awareness and recognize this phenomenon across all sectors of society to enhance inclusion in a world struggling with overweight and obesity. Key messages • People with obesity experience weight discrimination. Experiences of weight discrimination appear to be more common in women than men. • More information and understanding of weight-related stigma through education, research and values work is needed in different sectors of society.