The president of the ACT branch of the Sex Party says he has received a note threatening the life of his dog and demanding he "leave our churches alone".

Steven Bailey, who will run as a candidate in October's ACT Election, said he made a report to police after receiving the note at the weekend.

"I just received a letter that was left at my front door saying 'leave our churches alone, I hope your dog likes poison'," he said.

"This isn't an isolated incident actually."

Mr Bailey said he suspected the note was sent by religious extremists.

The Sex Party holds liberal views on many social issues, and Mr Bailey said candidates had previously received death threats over their push to end tax subsidies for churches.

"The Sex Party has been running a very strong campaign against religious entities receiving a tax subsidy," he said.

"We have received some threats in regard to that ... that's what I would guess the treat would be in relation to.

"I don't want this type of behaviour really to set the tone of the ACT election over the next five months."

Mr Bailey joked that his dog would be staying out of harm's way for a few days.

"Bruce will be spending a little bit of time in a safe house with some friends," he said.