Paul Dalglish scored twice to condemn relegated Shrewsbury to defeat in their final League game.
It also means the hapless Shrews ended their pitiful Division Three campaign with a club-record eighth
Shrewsbury's stint in the League began 53 years ago, ironically with a match against Scunthorpe, and defeat was a sad end to their tenure.
But victory for Scunthorpe confirmed their own place in the promotion
Shrewsbury, under the temporary management of senior pro Mark Atkins following
Kevin Ratcliffe's resignation, missed several good first-half opportunities.
But Luke Rodgers eventually fired them into a 43rd minute lead after being sent through by Jamie Tolley's headed pass.
But the Iron levelled five minutes into the second half when Dalglish scored
with an angled shot into the far corner after being set up by Matt Sparrow's
Dalglish clinched Scunthorpe's win in the 81st minute when his 35-yard free-kick defeated Mark Cartwright.
Shrewsbury: Cartwright, Moss, Holt, Wilding, Murray, Lowe,
Jamie Tolley, Hulbert, Aiston, Rodgers, Jemson. Subs: Artell,
Glenn Tolley, Ian Stevens, Watts, Edwards.
Scunthorpe: Evans, Stanton, Dawson, Jackson, Strong, Sparrow,
Kilford, Calvo-Garcia, Beagrie, Carruthers, Dalglish. Subs:
Torpey, Lee Ridley, Parton, Featherstone, Capp.
Referee: S Tomlin (E Sussex)