The Men's 800 metres T13 event at the 2012 Summer Paralympics took place at the London Olympic Stadium from 7 to 8 September.

Athletes in this category have a variety of visual impairments, but can typically recognize contours from a distance of 2 to 6 metres.

Athletes in this category do not typically require a guide.

Prior to the competition, the existing World and Paralympic records were as follows: Competed 7 September 2012 from 13:05.

rule: first 3 in each heat (Q) plus the 2 fastest other times (q) qualified.