Concern for missing Sydney woman

A missing person alert has been issued for a young Sydney woman who has had no contact with her family since Tuesday.

Police say Samantha Attard was last seen at her home on Walder Road, Hammondville, in Sydney's southwest about 6pm (AEST) on April 15.

The 32-year-old is believed to be travelling in a black Mitsubishi Lancer with the NSW registration plates SAM44Y.

"Police ... were alerted after she failed to return home and could not be located or contacted," NSW Police said in a statement.

"Serious concerns are held for her welfare."

The missing woman is described as being of Mediterranean appearance, around 160cm tall, of slim build, with long brown hair with blonde tips.

Anyone who sees Ms Attard or knows her whereabouts is urged to contact police.