About two in three people in NSW and the ACT support a ban on greyhound racing, according to a survey by the RSPCA.
Sixty-four per cent of the 834 residents polled by the animal protection group supported the ban.
Approval ratings remained above 60 per cent regardless of whether respondents were coalition, Labor or swinging voters, according to the survey released on Saturday.
RSPCA Australia's Dr Jed Goodfellow said the result was proof "the majority of caring Australians are opposed to killing dogs for sport and gambling".
"The NSW and ACT governments have made the right decision in responding to their concerns by ending greyhound racing in those jurisdictions," he said.
The RSPCA survey found support for the ban was 77 per cent in metropolitan areas and 67 per cent among suburban respondents.
Support was close to 60 per cent in rural and regional areas (59 per cent) and non-capital cities (58 per cent).
The NSW government has vowed to shut down the greyhound industry by July 2017, while the ACT government has repeatedly warned the sport has no future in the territory.
The decision has contributed to a slump in NSW premier Mike Baird's approval ratings.
It has also led to reports that several senior NSW National MPs are ready to unseat Deputy Premier Troy Grant as leader if he does not step away from the controversial policy.
The NSW government is also facing pressure from from Canberra, with some federal NSW MPs arguing the ban plan is starting to affect the Turnbull government in outer suburbs and regions.
Nationals MP Chris Gulaptis, who was one of three party MPs to vote against the bill in August, this week said he remained hopeful Premier Mike Baird might change tack on the damaging issue.
