We construct a unique dataset from several databases including CRSP, FDIC's Summary of Deposits, and BHC database to investigate the impact of geographic diversification on return, risk, and firm value of large publicly traded BHCs. The deposit dispersion employed here as a measure of geographic diversification has some advantages over those used in the extant literature; it accounts for both the number of locations in which a BHC operates, and the level of activity in each location, it is continuous, and it is limited to a zero-unity range facilitating comparison of geographic diversification across BHCs. Our empirical results show that geographic diversification is associated with a significant decline in BHC total, firm-specific, and systematic market risks, and insignificant return and firm value effects. These results provide a rationale for the BHC diversification, and mergers and acquisitions witnessed in the recent decades, in spite of the zero return and value effects. Moreover, we investigate how the distance between the parent BHC and subsidiary banks affects BHC return, risk, and firm value. We find that BHC-subsidiary distance raises BHC total and firm-specific risks, while leaving the BHC return unaffected and reducing BHC value. The first result supports the internal monitoring hypothesis. The value effect is inconsistent with studies in corporate finance, suggesting that the findings on corporate firms do not necessarily extend to BHCs.