The English dative alternation, which involves an alternation between the double object construction (DC) and the adpositional construction (AC), has been known to be one of the most problematic areas for L2 learners. This paper investigates the factors influencing the Korean English as a foreign language learners’ choices between the two constructions. The Korean section of the TOEFL11 corpus was used and sentences with dative constructions were extracted from the corpus. Nine factors were then encoded and analyzed with a generalized linear mixed-effect model. From the analysis, the following facts were observed: (1) Korean EFL learners’ choice between the DC and the AC was influenced by five factors: animacy of theme, definiteness of theme, pronominality of recipient, length difference between theme and recipient, and individual verbs; (2) despite some similarities in choice of alternation between Korean EFL learners and ENL speakers, the two groups also exhibited differences, and (3) these differences originated from the different effects of these factors.