Athletics at the 1948 Summer Olympics – Men's decathlon

The men's decathlon event at the 1948 Olympic Games took place between August 5 & August 6. 17-year-old Bob Mathias of the United States won with a points total of 7139.

Competition format
The decathlon consists of ten track and field events, with a points system that awards higher scores for better results in each of the ten components. The athletes all compete in one competition with no elimination rounds.

Schedule
All times are British Summer Time (UTC+1)

Records
Prior to the competition, the existing World and Olympic records were as follows.

Overall results
{{legend|#F2F5A9|The highest mark recorded in each event is highlighted in yellow. Because there were ties in three events, including five for the high jump, these marks were split between twelve competitors with the gold medallist claiming two of them.|border=solid 1px #AAAAAA}}
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