Wilson, 24, is the only addition to the 18 women who formed the first group to be given central contracts in 2014.
The right-hander made her international debut in 2010 but has not represented England since 2011.
"She thoroughly deserves to be awarded a central contract," said ECB director of women's cricket Clare Connor.
"She scored significant runs throughout the summer and has been a dedicated member of the England women's performance squad during the past 18 months."
Following defeat by Australia in the multi-format Ashes series earlier this year, England appointed Mark Robinson as head coach in November.
The former Sussex coach's first series in charge will be against South Africa in February 2016, with three one-day internationals followed by three T20 Internationals.
England will also take part in the 2016 World Twenty20 in India, overseas tours to West Indies and Sri Lanka and a home series against Pakistan in what Connor called "the busiest ever 12 months for England women".
She added: "The awarding of central contracts ensures that the squad will be as best prepared and supported as possible for each of those contests."
Full list of centrally contracted professionals:
Charlotte Edwards (capt), Tammy Beaumont, Katherine Brunt, Kathryn Cross, Georgia Elwiss, Natasha Farrant, Lydia Greenway, Rebecca Grundy, Jenny Gunn, Danielle Hazell, Amy Jones, Heather Knight, Laura Marsh, Natalie Sciver, Anya Shrubsole, Sarah Taylor, Lauren Winfield, Fran Wilson, Danielle Wyatt

In her new book Unfiltered, the Golden Globe-nominated actress writes: "Many of my deepest insecurities stem from these issues with my dad."
She also penned an open letter to the Genesis drummer, saying she forgives him for "not always being there" and "not being the dad I expected".
Collins left Lily's mother Jill Tavelman when the actress was five.
In her book of essays, Unfiltered: No Shame, No Regrets, Just Me, the 27-year-old star explains her father then moved from England to Switzerland, where he stayed for more than two decades.
"He may have still been alive, but most of the time it felt as if he were completely gone," writes Lily. "I knew he loved me, yet he wasn't physically around to tell me."
She says a "terrible disconnect" developed between her and Collins - who has four other children - as she got older.
"He assumed everything was always fine because I never said otherwise. It established a detrimental pattern.
"And I've realized that many of my deepest insecurities stem from these issues with my dad. It's taken me more than a decade to resolve some of them (others I'm still resolving) and to finally build up the courage to speak my mind to him."
The Mirror Mirror and Love, Rosie actress - nominated for a Golden Globe this year for Rules Don't Apply - encourages her readers to share an open letter she wrote with their fathers, or to write their own.
In it, she assures her father she will always need him and "always be your little girl", but also tells him: "We all make choices and, although I don't excuse some of yours, at the end of the day we can't rewrite the past. I'm learning how to accept your actions and vocalise how they made me feel.
"I accept and honour the sadness and anger I felt toward the things you did or didn't do, did or didn't give me."
She continues: "I forgive you for not always being there when I needed and for not being the dad I expected. I forgive the mistakes you made.
"And although it may seem like it's too late, it's not. There's still so much time to move forward."
Lily, whose book is published by Ebury Press on Tuesday, ends by saying: "I love you with all of my heart, more than you'll ever know."
Follow us on Facebook, on Twitter @BBCNewsEnts, or on Instagram at bbcnewsents. If you have a story suggestion, email entertainment.news@bbc.co.uk.
Middlesex batter Fran Wilson has been awarded a central contract by the England and Wales Cricket Board for 2016-17.
[NEXT_CONCEPT]
Lily Collins says it was "painful" that her musician father Phil was absent from much of her childhood.