The Red Rose county needed to secure maximum batting points in their final game against Hampshire, win the game and hope that Nottinghamshire suffered a heavy defeat by Somerset if they were to avoid the drop
Lancashire are set to play in Division Two in 2019
Lancashire will play Division Two cricket in next year's County Championship after their relegation was all-but confirmed on Tuesday.
The Red Rose county needed to secure maximum batting points in their final game against Hampshire, win the game and hope that Nottinghamshire suffered a heavy defeat by Somerset if they were to avoid the drop but the equation was redundant once they had been bowled out for 273 in their first innings at the Ageas Bowl.
Lancashire could in theory still be saved by Notts receiving points deductions for slow over rate, though that remains a hugely unlikely outcome.
It completes a hugely disappointing season for the Old Trafford club, who were knocked out of the T20 Blast at the semi-final stage and failed to reach the knockout rounds of the Royal London One-Day Cup.