Apple CEO Steve Jobs remains America's leading CEO, according to Forbes' monthly CEO approval poll.

Forbes describes Jobs - who is currently recovering from life-saving cancer surgery - as "perpetually unassailable".

Apple's mercurial leader has been the most well-regarded CEO each month since the poll began, though he tied with Yahoo! CEO Terry Semel in June.

Jobs' achieved an 85 per cent approval rating in July. His highest-ever approval rating was in February, when he attracted 94 per cent approval.