At the weekend, the 39-year-old confirmed that he was in discussions with the Championship outfit and it appears that negotiations have progressed over the past 48 hours.
Derby had also been linked with Brentford manager Dean Smith, who was also on West Bromwich Albion's shortlist, but Lampard will bring something different to a club that has struggled to get out of the second tier.
Derby hope Lampard's presence will help them lure exciting players after Rowett's decision to jump ship for newly-promoted Stoke. "It's a big club with big history and I want to get into management". We'll carry on speaking when I go home, and we'll see.
Giroud joins Zidane on 31 goals as France beats Ireland 2-0
France striker Olivier Giroud believes his January move to Chelsea has been the flawless preparation for this summer's World Cup. For us it is great preparation for the Nations League and a big opportunity for some of our less experienced players.