The densities of acetic acid-water mixtures were measured at temperatures between 290 and 460 K and concentrations ranging from 25 wt % acetic acid to 100 wt % acetic acid. The data were correlated with a polynomial function in temperature and concentration and were extrapolated to low temperatures for comparison with literature data. The data were also correlated using two association models and a model based on the generalized corresponding states principle (GCSP). Although the association models provide more information on the structure of the solutions, the GCSP method required much less information and could apparently be extrapolated over a significant range of temperatures.