We show that household social connections transmit shocks that influence bank deposits. We find that counties experience an increase in bank deposits when they are more socially connected to counties affected by natural disasters. This effect is not driven by physical proximity, large disasters that attract significant media coverage, or other cross-county channels, including multimarket bank branch networks, population migration, or economic connections. Banks that collect deposits in highly socially-connected counties experience high deposit volatility, but geographic diversification reduces the volatility associated with depositor social connectedness.