The women's 800 metres event at the 2023 European Athletics U23 Championships was held in Espoo, Finland, at Leppävaara Stadium on 13 and 14 July.

[1] Prior to the competition, the records were as follows: Qualification rules: First 3 in each heat (Q) and the next 2 fastest (q) will qualify for the final.

[2] [3]