The present invention relates to a cycloalkanone composition which contains cycloalkanone (1) in an amount of 70 wt % or more based on the composition, wherein the content of a dimer of a cycloalkanone represented by formula (2) is 0.055 or less in terms of weight ratio to the cycloalkanone (1), a process for producing the same, a process for producing a composition containing alkyl acetate (5) by using the cycloalkanone composition, and an alkyl acetate composition obtained by the process ##STR00001## wherein n is an integer of 1 or 2, R.sup.1 and R.sup.2 each represent H, a C1 to C8 alkyl group etc., and R.sup.3 represents a C1 to C3 alkyl group.