The men's 100 metres at the 2011 European Athletics Junior Championships were held at the Kadrioru Stadium on 21 and 22 July.
The 21st European Athletics Junior Championships were held between 21 and 24 July 2011 in the Kadrioru Stadium in Tallinn, Estonia.
| Gold |  France (FRA) |
| Silver |  Great Britain (GBR) |
| Bronze | Great Britain (GBR) |
Prior to the competition, the existing world junior and championship records were as follows.
| World Junior Record |  | 10.01 | Paris, France | 24 August 2003 |
 | Eugene, United States | 28 June 2008 | ||
| Championship Record | | 10.04 | Novi Sad, Serbia | 24 July 2009 |
| European Junior Record | ||||
| World Junior Leading | | 10.13 | Waco, United States | 23 April 2011 |
| European Junior Leading | | 10.20 | Antony, France | 25 June 2011 |
Gold medalist Jimmy Vicaut established a new WJL with 10.07 sec in the final.
| Date | Time | Round |
|---|---|---|
| 21 July 2011 | 17:15 | Semifinals |
| 22 July 2011 | 17:10 | Final |
Qualification: First 2 in each heat (Q) and 2 best performers (q) advance to the Final. [1]
Wind:
Heat 1: −1.8 m/s, Heat 2: −0.5 m/s, Heat 3: −0.7 m/s
| Rank | Heat | Name | Nationality | React | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 1 | Jimmy Vicaut | | 0.148 | 10.12 | Q, WJL, PB |
| 2 | 3 | Adam Gemili | | 0.186 | 10.49 | Q |
| 3 | 2 | David Bolarinwa | | 0.166 | 10.55 | Q |
| 4 | 3 | Dario Horvat |  | 0.166 | 10.57 | Q |
| 5 | 1 | Sam Watts | | 0.173 | 10.66 | Q |
| 6 | 3 | André Biveti |  | 0.180 | 10.69 | q |
| 7 | 1 | Giovanni Galbieri |  | 0.171 | 10.70 | q |
| 8 | 2 | Yiğitcan Hekimoglu |  | 0.215 | 10.71 | Q |
| 8 | 3 | Kamil Supiński |  | 0.164 | 10.71 | |
| 10 | 2 | Ken Romain | | 0.209 | 10.75 | |
| 10 | 3 | Dávid Ónodi |  | 0.203 | 10.75 | |
| 12 | 2 | Odain Rose |  | 0.216 | 10.80 | |
| 13 | 3 | Omri Harush |  | 0.166 | 10.81 | PB |
| 14 | 2 | Kostas Skrabulis |  | 0.143 | 10.84 | |
| 15 | 1 | David Alejandro |  | 0.172 | 10.89 | |
| 16 | 3 | Vladimir Jean Bart | | 0.163 | 10.91 | |
| 17 | 2 | Mateusz Kołodziej | | 0.171 | 10.94 | |
| 18 | 1 | Diogo Antunes | | 0.167 | 10.98 | |
| 19 | 3 | Sebastiano Spotti | | 0.178 | 10.93 | |
| 20 | 2 | Tiziano Proietti | | 0.194 | 11.03 | |
| 21 | 1 | Andrew Cavilla |  | 0.230 | 11.75 | PB |
| 1 | Rasmus Rooks |  | 0.180 | DNF |
Wind: +0.3 m/s [2]
| Rank | Lane | Name | Nationality | React | Time | Notes |
|---|---|---|---|---|---|---|
 | 4 | Jimmy Vicaut | | 0.164 | 10.07 | WJL, PB |
 | 3 | Adam Gemili | | 0.182 | 10.41 | |
 | 6 | David Bolarinwa | | 0.153 | 10.46 | |
| 4 | 5 | Dario Horvat | | 0.173 | 10.49 | |
| 5 | 8 | Sam Watts | | 0.176 | 10.61 | |
| 6 | 1 | André Biveti | | 0.187 | 10.62 | PB |
| 7 | 2 | Giovanni Galbieri | | 0.195 | 10.65 | |
| 8 | 7 | Yiğitcan Hekimoglu | | 0.200 | 10.80 |
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