| Noc: | LUX |
| Nocname: | Luxembourg Olympic and Sporting Committee |
| Games: | Summer Olympics |
| Year: | 1912 |
| Website: | |
| Location: | Stockholm |
| Competitors: | 21 |
| Sports: | 2 |
| Flagbearer: | Jean-Pierre Thommes[1] |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Luxembourg competed at the 1912 Summer Olympics in Stockholm, Sweden. It was the first official appearance at the modern Olympic Games for the nation, although it was later discovered that one Luxembourgish athlete competed in 1900.
See main article: Athletics at the 1912 Summer Olympics.
Two athletes represented Luxembourg in the nation's Olympic debut. Pelletier's 17th-place finish in the shot put was Luxembourg's best placement.
Ranks given are within that athlete's heat for running events.
| Athlete | Events | Heat | Semifinal | Final | |||
|---|---|---|---|---|---|---|---|
| Result | Rank | Result | Rank | Result | Rank | ||
| Paul Fournelle | Long jump | align=center colspan=2 | N/A | No mark | 30 | align=center colspan=2 | did not advance |
| Marcel Pelletier | Shot put | align=center colspan=2 | N/A | 11.04 | 17 | align=center colspan=2 | did not advance |
| Discus throw | align=center colspan=2 | N/A | 33.73 | 33 | align=center colspan=2 | did not advance | |
fourth place, 35.95 points
fifth place, 16.30 points