The 2009–10 Bill Beaumont Cup (Rugby Union County Championship) was the 110th edition of England's County Championship rugby union club competition. 
|2009–2010 Bill Beaumont Cup County Championship|
|Champions||Lancashire (20th title)|
Lancashire won their 20th title after defeating Gloucestershire in the final.
|31 May 2010|
|Try: Arnold (2), Collins, Turner, Baleirara |
Con: Collins (2), O'Brien (2)
|Pen: Stevenson, Trigg|
Referee: Luke Pearce
- ^ "English County Championship". Rugby Football History.
- ^ "The County Finals". County Rugby.com.
- ^ "Bill Beaumont Cup:Gloucestershire 6 Lancashire 36". Stroud News & Journal.