The 2009 Challenger DCNS de Cherbourg was a professional tennis tournament played on indoor hard courts. It was part of the 2009 ATP Challenger Tour. It took place in Cherbourg-en-Cotentin, France between 2 and 8 March 2009.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
 Belgium | Christophe Rochus | 60 | 1 | |
 France | Arnaud Clément | 73 | 2 | |
| France | Nicolas Mahut | 131 | 3 | |
| France | Adrian Mannarino | 132 | 4 | |
| France | Mathieu Montcourt | 138 | 5 | |
| France | Josselin Ouanna | 163 | 6 | |
| France | Édouard Roger-Vasselin | 180 | 7 | |
| France | Alexandre Sidorenko | 181 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Richard Bloomfield Jean-Christophe Faurel Romain Jouan
Eric Gomes (as a Lucky loser)
Alex Kuznetsov (as a Lucky loser)See main article: 2009 Challenger DCNS de Cherbourg – Singles. Arnaud Clément def. Thierry Ascione, 6–2, 6–4
See main article: 2009 Challenger DCNS de Cherbourg – Doubles. Arnaud Clément / Édouard Roger-Vasselin def. 
Martin Fischer / Martin Slanar, 4–6, 6–2, [10–3]