The defender saw off competition from Mohamed Salah, who came a close second, and Thiago Alcantara to pick up the prize for the first time this season following a poll on Liverpoolfc.com.
Alexander-Arnold’s highlight of the month came against Aston Villa, when he swept in a stoppage-time winner at Anfield to clinch a 2-1 victory for the Reds.
The No.66 also contributed assists against Arsenal and Leeds United away from home.