A new corresponding-states model for the correlation of the surface tension of organic acids as a function of the temperature is proposed. The model requires the critical temperature and the value of the surface tension at a low temperature as inputs. It is designed by using three universal constant coefficients that were obtained from 608 selected surface tension data for 17 organic acids. For these fluids, the value of the surface tension at the triple point, or at most 1 K higher, is known. The overall average absolute deviation (OAAD) and mean percentage deviation (MPD) were 2.37% and 0.18%, respectively. The model was then applied to try to predict 379 surface tension values for 12 other organic acids for which experimental values are available, but the lowest temperature considered is not near the triple point. In this case, the OAAD and the MPD were 3.49% and -2.70%. Finally, the model was applied to a set of 70 fluids (1079 data points) for which more than 90% of the data available in the DIPPR database were obtained by using the Sugden's parachor method. The predictions of the proposed model were compared with those offered by the DIPPR database, finding an OAAD of 5.10% and an MPD of 0.64%. A comparison with seven other previous corresponding-states models, some of which were specifically designed for acids, is made for the three mentioned subsets. It is found that the model proposed here is clearly the most accurate and can be used as a prediction tool.