Police have confirmed the body of a man found in missing woman Ruth Ridley's car in Victoria is that of her estranged husband, 61-year-old Gary Ridley.

The disappearance of Mrs Ridley, 58, was reported to police last Wednesday by a family member who held grave concerns for her welfare.

"We're very worried about Ruth Ridley, so too is her family, that's why our detectives are investigating this matter," Detective Inspector Adrian Telfer said.

Police believe the mother of three travelled from her home in Port Macquarie to Tumbarumba last month in a dark blue Mitsubishi Pajero towing a caravan.

"What we do know is on Tuesday of last week a 61-year-old male who is known to Ruth Ridley was found deceased in Victoria a short distance from the border," Detective Inspector Adrian Telfer said.

The body of her estranged husband was discovered in Ruth Ridley's car. ( Supplied: NSW Police )

Police on Monday confirmed the body was that of her estranged husband Mr Ridley.

"Obviously her family are extremely concerned about her and that's what we're dealing with today," Detective Inspector Adrian Telfer said.

Appeal for information

The car was found on Shelley Road, Shelley, in Victoria last Tuesday — 11 days after Mrs Ridley left Port Macquarie — with the body of her estranged husband inside.

The caravan was located in Tumbarumba the next day.

A man's body has been found in the search for missing woman Ruth Ridley. ( Supplied: NSW Police )

Detective Inspector Telfer said Mrs Ridley was last seen on October 24 at a supermarket in the Albury area.

"That is the last time we can confirm her whereabouts," he said.

"We are still appealing for anyone in the Riverina or wider community, including Victoria, if you have any information as to where she is or if you have seen her since the 24th of October to please come forward."

Police believe Mrs Ridley's car and caravan was at Neil's Reserve. ( Supplied: NSW Police )

A post-mortem examination has been conducted on Mr Ridley but the results are not yet known.

Police are appealing for anyone with information who may have been around the Victorian border, on the Murray River, on the weekend of October 26 and 27 October.

"What we do believe is that there was Ms Ridley's vehicle and a white caravan at Neil's Reserve, about 7 kilometres east of the Walwa," Detective Inspector Adrian Telfer said.

"We are appealing for anyone who was camping … to please come forward, we'd like to speak to you.

"Specifically, if anyone in that area has any dashcam footage to please come forward."