The extent to which citizens vote in accordance with their own principles and priorities has been proposed as an important measure of a democracy's health. This article introduces a new method of evaluating the ability of individuals to vote for the political party with policy positions closest to their own – to vote “correctly”. Following Lau and Redlawsk (1997), a “correct vote” is defined as the vote choice individuals would make under conditions of perfect information. In other words, a vote is “correct” if it is cast for the party that a voter should vote for, based upon a fully informed comparison of his or her policy positions with those of the parties contesting an election. Voters' policy preferences are estimated here using election study data, and the positions of parties are derived through data from the Comparative Manifestos Project. For illustrative purposes, this new method is applied to the 2004 Canadian federal election. Correct voting rates are calculated by comparing voter and party positions in seven dimensions of political competition, accounting for the relative importance of each dimension. While this study's data are exclusively Canadian, the approach introduced is applicable to other settings.