In 2005, a total of 4.0% (95% confidence interval [CI] = 3.9-4.1) of respondents reported a history of MI, and 4.4% (CI = 4.3-4.5) reported a history of angina/CHD. A total of 6.5% (CI = 6.3-6.6) of respondents reported a history of one or more of these conditions (MI, angina/CHD, or both). Men had a significantly higher prevalence of MI history than women (5.5%, CI = 5.3-5.7, versus 2.9%, CI = 2.8-3.0), angina/CHD (5.5%, CI = 5.3-5.8, versus 3.4%, CI = 3.3-3.6), and one or more of these conditions (8.2%, CI = 8.0-8.5, versus 5.0%, CI = 4.9-5.2). The prevalences of history of MI, angina / CHD, and one or more of these conditions increased among successive age groups and decreased with higher education. Of persons with less than a high school diploma, 9.8% (CI = 9.3-10.4) reported a history of one or more of the conditions, nearly twice the proportion among college graduates (5.0%, CI = 4.7-5.2). American Indians/Alaska Natives and multiracial persons had substantially higher prevalences of a history of MI, angina / CHD, and one or more of these conditions than did non-Hispanic whites. The prevalences of all of these conditions among whites and blacks were similar.