And there are strong rumours that Routledge could end up as part of a deal that sees Neil Taylor heading to the North East with the Magpies already having had a bid turned down
"We have expressed an interest in Routledge and are in discussions with Newcastle," a Swansea spokesman told BBC Wales Sport.
Routledge spent the second half of last season on loan at Queens Park Rangers but has failed to agree personal terms on a permanent return to Loftus Road.
Swansea also face competition from Nottingham Forest for the 26-year-old.