The paper proposes that industrial-organizational (I-O) psychology will benefit greatly from expanding our research focus from predominantly individual differences to studying organizational differences. We argue here that an increased organizational frame of reference on variables of interest to I-O psychology (e.g., selection, job design, performance management (PM), work motivation) is important because it will enhance our understanding of organizational behavior and make I-O research more effective in practice. After noting some organizational-level research already being done, several examples are provided for how an organizational mindset and methods can provide new insights into traditional areas of I-O effort. Also discussed is how methodological issues that may have constrained the study of organizational differences in the past and the potential new issues such research may yield can be addressed. We conclude that the future maintenance and enhancement of the I-O psychology brand as a science–practice profession requires enhanced attention to the organization level of analysis as our frame of reference for research.