A ccording to the classical perspective, polity size and democracy are inversely related. In this article, we argue that there is an important exception that manifests itself at the district level in settings where multiparty competition is allowed. Specifically, we find that larger districts encourage greater contestation. This results from a little-noticed mechanical effect as well as from several features of constituencies that are affected by size and have direct repercussions for contestation. To demonstrate this thesis we assembled a unique dataset, the Multi-level Election Archive (MLEA), which unites electoral contests across a variety of districts (national, regional, and local) and elective offices from the eighteenth century to the present, including a total of 88 countries, 2,344 elections, 79,658 districts, and more than 400,000 contests. With this evidence we were able to conduct a broad array of statistical tests, some global and others focused on particular countries or election types, all of which support our general argument. E lectoral contestation may be defined as the degree of election-based competition in a political unit. Where contestation is minimal there is little organized opposition, and the incumbent party captures most of the votes and seats. Where contestation flourishes there are more competitors than available seats, a tight race for votes and seats, and frequent turnover in control. Contestation implies ex ante electoral uncertainty. 1 So understood, contestation is integral to the electoral (aka elite, minimal, procedural, or realist) conception of democracy, in which democracy is achieved through competition among leadership groups vying for the electorate's approval during periodic elections (