| Tournament: | 2021 Men's EuroHockey Club Trophy I |
| Country: | Austria |
| City: | Vienna |
| Dates: | 30 September – 3 October |
| Venues: | Post SV Wien |
| Teams: | 6 |
| Associations: | 6 |
| Champions: |  Montrouge |
| Second: |  Post SV |
| Third: | Rotweiss Wettingen |
| Count: | 1 |
| Matches: | 9 |
| Goals: | 38 |
| Top Scorer: |  Yurii Dzemukh Louis Poupée |
| Top Scorer Goals: | 4 |
| Best Player: | Louis Poupée |
| Previous Year: | 2020 |
| Previous Tournament: | 2020 Men's EuroHockey Club Trophy I |
| Next Year: | 2022 |
| Next Tournament: | 2022 Men's EuroHockey Club Trophy I |
The 2021 Men's EuroHockey Club Trophy I was the 44th edition of Europe's secondary men's club field hockey tournament organized by the European Hockey Federation and the first edition since it was renamed from the EuroHockey Club Trophy to the EuroHockey Club Trophy I. It was held from 30 September to 3 October 2021 at Post SV Wien in Vienna, Austria.
Montrouge won their first title by defeating the hosts Post SV 5–0 in the final. Rotweiss Wettingen won the bronze medal by defeating Stroitel Brest 4–3 in a shoot-out after the match finished 2–2.[1]
The following six teams with the following seeding participated in the tournament. Cardiff & Met and Western Wildcats withdrew before the tournament.[2]
Montrouge
Pomorzanin Torun
Stroitel Brest OKS Vinnitsa Post SV--------
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Montrouge Post SV Stroitel Brest OKS Vinnitsa Pomorzanin Torun