Démare, who signed his fifth success this season after three stage victories in the Giro and a success on the Route d'Occitanie, won in power ahead of the Dutchman Olav Kooij and the German Phil Bauhaus.
Despite a breakaway attempt by the Italian Alessandro De Marchi and the Frenchman Nans Peters in the final circuit visiting the streets of Krakow, the sprinter teams did not shake and the peloton appeared grouped in the final straight .
A godsend for Démare, frustrated by his second place during the fifth stage on Wednesday and who took his revenge by clearly winning to confirm his white jersey as winner of the points classification.
Hayter, 23, took the leader's yellow jersey during the penultimate stage on Thursday, an uphill time trial in which he took third place.
On the list of winners of this World Tour classified event, he succeeds the Portuguese Joao Almeida.
In the final classification, the British time trial champion, the first British rider to win the Tour of Poland, leads the Dutchman Thymen Arensman by 11 seconds and the Spaniard Pello Bilbao by 18 seconds, gaps unchanged from on the eve.
The first Frenchman, Rémi Cavagna, finished sixth at 31 seconds.
© 2022 AFP