UBV observations of over 37,000 stars have been compiled from the literature to yield 165 color-magnitude diagrams. There is a list of bibliographic references for each cluster diagram. Introduction: This catalog contains 165 sets of data collected from the literature as of 1976. For many clusters, more than one data set is included. Most of the data is in the form of V and B-V; for some sets, U-B is also given. A few sets are in other systems but have been transformed to UBV. The original publication contains plots of the data so that the color magnitude diagrams can be easily compared. Only the data are given in this version. Stars marked as non-members by the original authors including standard stars, were not included. Also excluded were data which the original authors collected from earlier references. The reference publication also contains extensive tables of data on each cluster. This information can be obtained from other sources, such as the Third Revised Galaxy Catalog. The color excess, E(B-V) is from Burstein and McDonald (1975AJ.....80...17B). If the value is enclosed in parentheses there was no value for E(B-V) in Burstein and McDonald and the value used was taken from Kukarkin (1975). The metal abundance [Fe/H] are from Kukarkin (1974). The spectral type is from Kinman (1959MNRAS.119..538K). If the spectral type is enclosed in parentheses the spectral type is taken from Kukarkin (1974). In the reference to the original table of data the first two numbers indicate the date, the rest of the reference follows. In a few cases the catalogue diagram did not check out with the published data. Every star listed in the published catalogue was plotted unless it was individually marked as a non member. A Xerox copy of the original C-M diagram was reproduced in the publication when the source of the difference between the original and the diagram in the catalogue could not be located.