Liam Dawson took his season tally to 49 wickets by taking two of the four wickets needed to secure victory, with Surrey only scoring 20 of the 73 required to lose by 52 runs before 11am
Southampton (day four of four): Hampshire 219 & 172, Surrey 207 & 132 - Hampshire won by 52 runs
Hampshire became just the second team to beat Surrey across their back-to-back LV= Insurance County Championship titles.
Only Lancashire had beaten Surrey in 2022 and 2023 in red-ball cricket, winning once in either campaign.
But Liam Dawson took his season tally to 49 wickets by taking two of the four wickets needed to secure victory, with Surrey only scoring 20 of the 73 required to lose by 52 runs before 11am.
Despite the defeat, Surrey were presented with the Division One trophy by ECB chair Richard Thompson.
Surrey had made it clear throughout the match that they had the intention to finish their triumphant season off with a victory.

Surrey have lifted back-to-back Division One titles [Steve Bardens/Getty Images]

Liam Dawson ensured Surrey would finish the season with a defeat [Warren Little/Getty Images]
That plan was skewed somewhat after they were confirmed as champions before lunch on day three, and celebrations took place after play concluded.
It took five balls for Jordan Clark to advance to Mohammad Abbas and prod to James Vince at first slip.
Jamie Overton came out and played a delicious straight drive, holding the pose like a peacock, and then a powerful sweep shot. But he was less gainly when his agricultural swing saw him stumped by Ben Brown off Dawson, the start of three wickets to fall in 12 balls to end the year.
Kemar Roach departed second ball when his wild swing flew to first slip, with the Abbas and Vince combination striking again. The Pakistan seamer ended the campaign with 53 scalps.
Sai Sudharsan, a first innings half-century maker, batted sensibly until Dan Worrall arrived and hacked at one, at which point his stylish 40 turned more towards aggression.
The Indian took on Dawson but only managed to top edge to Vince running across from the slips to end the contest and the season.
Hampshire finishing third for a second year in a row, having won eight times – the same as the champions.