Yorkshire 6 was an English Rugby Union league which existed for a short period in the 2000s and throughout its existence it was the basement league of club rugby in Yorkshire. It was merged with Yorkshire 5 towards the end of the 2000s and the teams which would have been promoted into Yorkshire 5 that season were elevated to Yorkshire 4. At this point Yorkshire 5 became the basement league of Yorkshire club rugby.
The original Yorkshire 6 was a tier 14 league with promotion up to Yorkshire 5. As the lowest ranked division in the Yorkshire leagues there was no relegation. At the end of the 1991–92 season the division was cancelled after five seasons.
Yorkshire 6 was re-introduced for the third time ahead of the 1999–00 season as a tier 15 league. The cancellation of North East 1, North East 2 and North East 3 (tiers 7–9) as part of Northern league restructuring by the RFU at the end of 1999–00 meant that Yorkshire 6 became a tier 11 league. After five seasons the division was cancelled once again at the end of the 2003–04 season.