The 2009 Natomas Men's Professional Tennis Tournament was a professional tennis tournament played on outdoor hard courts. It was the fifth edition of the tournament which was part of the 2009 ATP Challenger Tour. It took place in Sacramento, California, United States between 5 and 11 October 2009.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Robert Kendrick | 83 | 1 | ||
| Wayne Odesnik | 87 | 2 | ||
| Kevin Kim | 105 | 3 | ||
| Jesse Levine | 109 | 4 | ||
| Roko Karanušić | 122 | 5 | ||
 Colombia | Santiago Giraldo | 123 | 6 | |
| Ryan Sweeting | 147 | 7 | ||
| Grega Žemlja | 157 | 8 |
The following players received wildcards into the singles main draw:
Alexander Domijan
Daniel Evans Jan-Michael Gambill Ryan HarrisonThe following player received a Special Exempt into the singles main draw:
The following players received entry from the qualifying draw:
Louk SorensenSee main article: 2009 Natomas Men's Professional Tennis Tournament – Singles. Santiago Giraldo def. Jesse Levine, 7–6(4), 6–1
See main article: 2009 Natomas Men's Professional Tennis Tournament – Doubles. Lester Cook / David Martin def. 
Santiago González / Travis Rettenmaier, 4–6, 6–3, [10–5]