No formal bids have been received for the 28-year old Wales international.
But the ex-Brighton and Hove Albion and Nottingham Forest man’s experience (more than 300 games at club level) and form during the season just finished hasn’t gone unnoticed at second-tier level.
Add to that the fact he is left-footed and going into the final year of his contract, and it’s easy to see the appeal to rival clubs.
As with star striker Nahki Wells, Town have no pressing financial need to sell, and there is no desire to see Lynch move on.
But with head coach David Wagner reshaping his squad - there have been five signings already this summer with more to come - and knowing the player could leave on a free transfer next summer, any formal bid would have to be considered.
It’s believed Eastbourne-born Lynch is on the wanted list at QPR, who have released long-serving former Crystal Palace player Clint Hill.
In addition, Italian Gabriele Angela has returned to Watford after a loan spell at Loftus Road.
That has left former Tottenham Hotspur man Grant Hall and versatile ex-Manchester City player Nedum Onuoha as the main existing options in the middle of the defence.
QPR signed keeper Alex Smithies from Town for £2m last August.
Lynch made 40 appearances for Town in 2015-16, scoring two goals, and is a firm favourite with the fans.
He has made 126 appearances, scoring nine times, since joining on a fee from Forest in 2012, when he won his Wales cap against Bosnia and Herzegovina.