 The study analyzed global Twitter data from January 1 to June 30, 2020, to examine linguistic and geographical disparities of public awareness during the COVID-19 outbreak period, and found that users tweeting in official languages of India and Bangladesh had the highest awareness. Asian countries showed more disparities in awareness than European countries, and awareness in Eastern Europe was higher than in Central Europe. The ratio index, which quantifies and tracks awareness, had high correlations with global mortality rate, global case fatality ratio, and country-level mortality rate.