With more than $5 trillion in sales at stake in the grocery category, both offline and online retailers are fighting for their share of the biggest prize in retail. As consumers begin to embrace buying groceries online, we expect the global online grocery market to grow at a compound annual growth rate (CAGR) of 17% from 2017 to 2022. This report details our five-year forecast for online and offline grocery retail sales, online grocery buyers, and total retail sales for 27 countries.