Overview of the number of competitors per nation. Note that for races with a long history this statistic will be incomplete as historical starting lists are not always complete.
| Pos. | Nation | #Different riders |
|---|---|---|
| 1 | Italy | 1899 |
| 2 | France | 364 |
| 3 | Spain | 215 |
| 4 | Belgium | 212 |
| 5 | Switzerland | 117 |
| 6 | Netherlands | 100 |
| 7 | Germany | 84 |
| 8 | Russia | 53 |
| 9 | Colombia | 50 |
| 10 | Australia | 48 |
| 11 | United States | 47 |
| 12 | Denmark | 36 |
| 13 | Poland | 32 |
| 14 | Great Britain | 25 |
| 15 | Austria | 24 |
| 16 | Kazakhstan | 19 |
| 17 | Slovenia | 19 |
| 18 | Sweden | 17 |
| 19 | Norway | 17 |
| 20 | Ukraine | 17 |
| 21 | Portugal | 14 |
| 22 | Luxembourg | 13 |
| 23 | South Africa | 12 |
| 24 | Czech Republic | 12 |
| 25 | Canada | 11 |
| 26 | Ireland | 8 |
| 27 | Belarus | 7 |
| 28 | Latvia | 7 |
| 29 | Eritrea | 6 |
| 30 | Japan | 6 |
| 31 | New Zealand | 5 |
| 32 | Estonia | 5 |
| 33 | Venezuela | 4 |
| 34 | Lithuania | 4 |
| 35 | Croatia | 4 |
| 36 | Argentina | 4 |
| 37 | Slovakia | 4 |
| 38 | Brazil | 4 |
| 39 | Mexico | 3 |
| 40 | Finland | 3 |
| 41 | Costa Rica | 2 |
| 42 | Ecuador | 2 |
| 43 | Romania | 2 |
| 44 | Moldova | 2 |
| 45 | Israel | 2 |
| 46 | Hungary | 2 |
| 47 | Uzbekistan | 1 |
| 48 | Tunisia | 1 |
| 49 | Albania | 1 |
| 50 | Ethiopia | 1 |
| 51 | Serbia | 1 |
| 52 | Zimbabwe | 1 |