The 2009 USTA LA Tennis Open was a professional tennis tournament played on outdoor hard courts. It was part of the 2009 ATP Challenger Tour. It took place in Carson, California, United States between May 23–31, 2009.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
| Vince Spadea | 106 | 1 | ||
 Thailand | Danai Udomchoke | 124 | 2 | |
| Alex Bogomolov Jr. | 157 | 3 | ||
| Donald Young | 164 | 4 | ||
| Michael Russell | 168 | 5 | ||
| Sam Warburg | 195 | 6 | ||
 Australia | Carsten Ball | 200 | 7 | |
 Sweden | Björn Rehnquist | 202 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Scott Oudsema
Amir Weintraub Jesse Witten
Marcel Felder (as a Lucky loser)See main article: 2009 USTA LA Tennis Open – Singles. Michael Russell def. Michael Yani, 6–1, 6–1
See main article: 2009 USTA LA Tennis Open – Doubles. 
Harsh Mankad / Frederik Nielsen def. Carsten Ball / Travis Rettenmaier, 6–4, 6–4