The credibility and power of a manager were manipulated in vignettes. Eighty‐four subjects read a description and responded to scales measuring perceptions of power. Results indicated that credibility had a direct effect on power ratings. Objective power, which was manipulated in the vignettes, also had a direct effect on perceived power ratings. In addition, a significant interaction of objective power by credibility indicated that objective power had a moderating effect on the relationship between credibility and perceived power. The results are particularly meaningful with respect to the credibility manipulation, given that the scales used were designed specifically to measure reward, coercive, legitimate, expert, and referent power. Suggestions for future research on credibility and its relationship to social power are offered.