Although most people reported missing are found alive and well, there remains around 2000 missing long-term.

A missing NSW teenage girl has been found safe and well after her mother issued a desperate plea on social media to help find her.

Kiera-Lee McNamara, 13, went missing on Sunday, last seen in the vicinity of central coast suburb Gorokan.

Her mother, Chloe Johnston, took to Facebook this afternoon to report that her daughter had been found.

“From the very bottom of my heart, I want to thank the overwhelming response and support that you all have given over the past few days,” she wrote.

“I am truly grateful for everyone’s love and support!!”

Police told news.com.au this afternoon they were aware of Ms Johnston’s Facebook update, but officers are yet to sight Kiera-Lee.

Ms Johnston went to police earlier in the week to help find her missing teen.

“Please if anyone hears anything or sees anything at all, please let me know ASAP. You can also contact local police and make a report,” she wrote.

“All of Kiera’s family and friends are very worried about her and we are pleading that someone knows something of her whereabouts.”

Ms Johnston later wrote that Kiera had “apparently last been spotted at Wyong train station at 9am” on Tuesday.

“She may be travelling to Queensland. Please if anyone finds her, please call police straight away,” she wrote.

NSW Police said in a statement: “Police are appealing for public assistance to help locate a teenager missing on the Central Coast. Kiera-Lee McNamara, aged 13, was last seen at a home in Gorokan about 11am on Sunday, April 21 2019.

“She has not been seen or heard from since and police and her family are concerned for her welfare due to her young age. Kiera-Lee is described as being of caucasian appearance, about 150cm tall, a slim build and with brown shoulder length hair.

“She was last seen wearing a grey oversized singlet and black ‘Nike’ slides. Police have received information that she may have travelled by train from the Wyong area this morning, Tuesday April 23, 2019.

“Anyone who believes they may have seen Kiera-Lee, or know of her whereabouts, should contact police immediately.”