Registered voters as of September 2, 2010.
| Democrats | 78,509 | 51.75% |
| Republicans | 41,978 | 27.67% |
| NPA | 26,785 | 17.66% |
| Other | 4,430 | 2.92% |
| Total | 151,702 | 100% |
Available for download:
Demographic report of districts, municipalities, and the entire county.
September 2, 2010 (Excel) 
September 2, 2010 (PDF)