Data supporting the manuscript "The multi-peak adaptive landscape of crocodylomorph body size evolution", currently in review at BMC Evolutionary Biology. The zip folder contains 3 documents (Additional files 1, 2, and 3) and 4 subfolders (Additional files 4, 5, 6, and 7): Additional files 1: Supplementary methods and results, including information on (1) total length estimation from cranial measurements, (2) supertree construction, (3) time bins used for time series correlations and disparity calculation, and (4) regression results tables of all correlation analyses performed. Additional files 2: Datasets with information on crocodylomorph body size (cranial measurements), palaeolatitude, specimens and lifestyle. Additional files 3: AICc scores of all models fitted in our macroevolutionary analyses. Additional files 4: Folder containing all plots of SURFACE model fits. Additional files 5: Folder containing cross plotting of all SURFACE model fits, using distinct time-scaling methods. Additional files 6: Folder containing alternative crocodylomorph trees and FAD (First Appearance Datum) and LAD (Last Appearance Datum) of all species used in our analyses. Additional files 7: Folder containing R functions and data for running an example script of our model-fitting analyses.