The women's 800 metres T34 event at the 2020 Summer Paralympics in Tokyo, took place on 4 September 2021.

The T34 category is for wheelchair athletes with cerebral palsy.

Athletes in this category have minimal limitations or control problems in their arms and trunk while pushing a wheelchair.

Prior to the competition, the existing records were as follows:[1] The final took place on 4 September 2021, at 9:46:[2]