The March in August movement spread from Australia's capital cities to include regional centres on the weekend.

About 3000 people gathered in Sydney's Hyde Park yesterday, while organisers estimated 400 marched from Westport Park to Town Green and back.

They were bound by a lack of confidence in political leaders, and a desire for social change.

"We were united by the common cause of wanting government to give everyone a fair go," organiser Jan Mulquiney said.

"We want them to not just look after the rich, but those who are struggling too. We're united in saying we want them to look after Australia as a whole."

Marchers came from Collombatti, Bonny Hills, Kempsey and South West Rocks to march and hear guest speakers in Westport Park afterwards.

Some wanted the federal government to reconsider its border protection policy, while others were unhappy about Medicare changes, climate change and proposals to alter the ABC.

Nurses and teachers marched in support of better conditions, but there were many more stepping out in spirit.

"I received over 150 apologies from people who were sick or had commitments that meant they couldn't make it," Ms Mulquiney said.

Declared political voices were notably absent because the organisers didn't want to skew the action.

"We just wanted to make it about the people, and for people who don't normally have a platform," Ms Mulquiney said.

Wauchope and District Uniting Church's Reverend Elizabeth Raine and Reverend Doctor John Squires held aloft a banner decrying children in detention.

"It's an important issue within the Uniting Church," Rev Raine said.

"We have asked Minister Scott Morrison to dialogue with us because we have facilities, like Burnside, to house children.

"So far he has refused."

Rev Raines praised the simple and innovative signs of her fellow marchers.

"I quite liked one which said, 'There Are So Many Issues, I Don't Know Which One To Put On This Sign'."