Webb led the Linnets to their highest ever league position.
Keith Webb has resigned as the manager of King's Lynn following their final game of the season.
Webb led the team to a 3-1 away victory over Vauxhall Motors, confirming his exit after the final whistle.
Linnets chairman Ken Bobbins told BBC Radio Norfolk he was sorry to see Webb leave the club.
"I think he's done a fantastic job here, he's had a very difficult season. People forget he won the Southern League for us," he said.
"I wish him all the very, very best."
The club will be relegated from Blue Square North at the end of the season due to The Walks stadium falling short of League standards while earlier this year it emerged that players had been forced to accept a 30% wage cut due to the withdrawal of a major financial backer.
Despite a tumultuous few months off the pitch, many more vocal supporters have demanded Webb be sacked, even though he lead the team to mathematical safety a few weeks ago.
But Bobbins does not think that was a deciding factor.
"He still had support from the board and the majority of fans so I don't think it's that."
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