It was announced yesterday that the Leeds United legend and World Cup winner had died aged 85 following a long-term illness.
York councillor and former Lord Mayor, Dave Taylor, wrote a post on his personal Facebook page which sparked outrage on social media.
The York Green Party has apologised for the councillor's comments, which refer to Jack Charlton's 'involvement in hunting'.
The party has launched an internal investigation but said it hoped that people would 'forgive' Coun Taylor.
In the statement, the York Green Party said: "Late yesterday evening we were made aware of a post Councillor Dave Taylor made on his personal Facebook page in relation to the passing of Jack Charlton.
"We would like to apologise to the family of Jack Charlton for any additional upset this has caused at what is clearly an already upsetting time. We would also like to apologise to any fans who were also offended by these comments.
"Animal rights and hunting bring out strong emotions in people and Councillor Taylor made his comments in relation to Jack Charlton’s past involvement and promotion of hunting.
"However, Councillor Taylor now acknowledges that his comments and timing were inappropriate.
"The Green Party have strong values and it is clear that Councillor Taylor’s comments fall short of these values and what we expect from our elected officials. York Green Party will be taking forward our internal investigation in relation to this.
"Councillor Taylor has been an active ward councillor for 14 years and has been re-elected three times which we feel reflects the hard work he has done for the community. We hope people in time will be able to forgive Dave."