Hunter Valley Police District renews calls for public assistance following the disappearance of Arthur Cox, last seen at Owens Gap

POLICE are continuing to search for an Upper Hunter man, who's been missing for almost three weeks.

Arthur Cox, 47, was last seen at his property on Ashwood Road, Owens Gap, west of Scone, about 7.30am on Monday, May 20.

When he failed to return home the following day, family members notified officers from Hunter Valley Police District who began inquiries.

Police and family hold serious concerns for Mr Cox's welfare as he has not been seen or heard from since.

Officers conducted an initial land search on Tuesday, May 21, but suspended it due to poor light.

Another operation involving officers from Hunter Valley Police District and PolAir took place on Wednesday, May 22.

Now, police are renewing calls for public assistance.

Mr Cox is described as being of Caucasian appearance, between 175-180cms tall, with a solid build.

It's believed he could be travelling in a grey 2011 dual cab tray back Holden Colorado with New South Wales registration number BZZ 44W.

Anyone with information on his whereabouts is urged to contact police immediately, via Crime Stoppers on 1800 333 000 or https://nsw.crimestoppers.com.au

The public is reminded not to report crime via NSW Police social media pages.