Psychology is frequently accused of exhibiting a pervasive liberal bias, a claim largely based on surveys showing that its academics disproportionately identify as left-leaning. Critics then argue that this left-leaning bias skews psychology’s research and teaching on contentious topics like gender and race. However, the claim of liberal bias in psychology is dubious. The evidence for liberal bias is often limited to small-scale self-report surveys and U.S.-centric voter registration data, rather than on evidence that the entire discipline’s knowledge production is inherently skewed. The liberal bias debate often falls short of explaining how, or whether, personal political views actually influence scientific rigour.