The following NASCAR national series were held in 2005: - 2005 NASCAR Nextel Cup Series - The top racing series in NASCAR.
- 2005 NASCAR Busch Series - The second-highest racing series in NASCAR.
- 2005 NASCAR Craftsman Truck Series - The third-highest racing series in NASCAR.
{{start box}}{{succession box | before = 2004 in NASCAR | after = 2006 in NASCAR | title = NASCAR seasons | years = 2005 |
}}{{end box}} 2 : 2005 in NASCAR|NASCAR seasons |