The women's lightweight single sculls competition at the 2019 World Rowing Championships took place at the Linz-Ottensheim regatta venue.

[1] The schedule was as follows:[1] All times are Central European Summer Time (UTC+2) The two fastest boats in each heat advanced directly to the A/B semifinals.

[2] The three fastest boats in each repechage advanced to the A/B semifinals.

[3] The three fastest boats in each semi advanced to the A final.

[4] The A final determined the rankings for places 1 to 6.