<p>Despite increasing concerns about American democracy, recent studies find little public support for undemocratic practices. However, these studies ignore democratic neutrality—that is, expressing neither agreement nor disagreement with undemocratic practices. Here, integrating research on uncertainty, indifference, ambivalence, conditionality and socially desirable responding, we argue that democratic neutrality poses an overlooked threat to democracy. Reanalysing prominent survey data (<i>N</i> = 45,095) and conducting two original surveys (<i>N</i> = 3,039; including a candidate-choice experiment), we document democratic neutrality as (a) prevalent (half of Americans express neutrality towards one or more undemocratic practices), (b) reflecting substantively meaningful attitudes (versus inattention), (c) correlated with theoretically related constructs, (d) distinct from opposition to undemocratic practices, and (e) as consequential as outright support for undemocratic practices in shaping preferences for anti-democratic candidates. Our findings challenge optimistic empirical accounts of Americans’ attitudes towards democracy. Democratic neutrality may help explain, and be targeted to ameliorate, democratic backsliding.</p>