西摩·马丁·利普塞特（Seymour Martin Lipset，1922年3月18日－2006年12月31日），美国著名比较社会学家。

代表作《政治人：政治的社会基础》（Political Man：The Social Bases of Politics），发表后引起重大影响。利普塞特提出的“政治发展与现代化理论”在战后一度盛行，该理论认为社会经济的的发展必将导致民主政治的发展。但在解释拉美国家的军事政变时遇到困难。

Seymour Martin Lipset (March 18, 1922 – December 31, 2006) was an American political sociologist, a senior fellow at the Hoover Institution at Stanford University, and the Hazel Professor of Public Policy at George Mason University. His major work was in the fields of political sociology, trade union organization, social stratification, public opinion, and the sociology of intellectual life. He also wrote extensively about the conditions for democracy in comparative perspective.