The news will come as a blow to the 40-year-old who has been out of work since leaving his role as Leeds United assistant manager last December.
Speaking earlier this month Staunton, who was sacked as Ireland manager in October 2007 after an ignominious 21-month reign, publicly declared his interest in the job.
“Of course I’d be interested in the Rotherham job, they’ve got a strong squad of good players, and are riding high at the moment. They’ve got a very strong chance of going up.
“I came up against Rotherham with Leeds, and we looked at one or two players from that league, I know what it’s all about.
“I’ve kept in touch with all the English divisions, but I’ve been looking at League One and League Two a lot more than the Premier League and Championship. There are a lot of strong squads in those leagues.’’
However a brief statement on Rotherham’s website last night confirmed Moore had beaten off competition from Staunton and Steve Cotterill to clinch the role.
“Rotherham United are delighted to confirm Ronnie Moore as the club’s new first team manager,’’ the statement read.
Moore, who has been out of work since being sacked by Tranmere in June, will be unveiled at a press conference at 10.30am today.
Moore proved a success in his first spell at the club, guiding the South Yorkshire outfit to the second tier after back-to-back promotions in 2000 and 2001. He left the Millers in 2005 after eight years at the helm to join Oldham, but left Boundary Park after just 15 months to join the Latics’ League One rivals Tranmere. Moore almost guided Rovers into the League One play-offs last season, but was dismissed by the club in the summer. The Millers have been without a manager since Mark Robins left to become Barnsley boss earlier this month.