Clark, 46, brings a wealth of Football League experience having previously managed Huddersfield Town, Birmingham City, Blackpool and Bury, whilst also managing Kilmarnock in Scotland
The midfielder made 528 appearances in his professional career, scoring 66 goals, most notably for Newcastle United, Sunderland and Fulham.
Clark’s first step into management was at Huddersfield Town in 2008 where he took the side the League One play-offs in back to back seasons.
During his four-year spell, he set a Football League record of 43 consecutive games undefeated – which still stands today.
And Clark, who has not managed since parting company with Bury in October 2017, is honoured to join Blyth.