He faced stiff competition from three team-mates - Virgil van Dijk, Trent Alexander-Arnold, and Sadio Mane - as well as Manchester City’s Kevin De Bruyne, who many believed was a front runner for the award alongside Henderson.
The overall top five is Henderson, De Bruyne, Marcus Rashford, Van Dijk, and Sadio Mane.
As well as that top five, 10 other players received votes; Alexander-Arnold, Alisson, Raheem Sterling, Aaron Wan-Bissaka, Sergio Aguero, Adama Traore, Danny Ings, Jack Grealish, James Maddison and Jonny Evans.
Henderson was naturally elated at his achievement, but stressed the importance of the contributions of his team-mates to Liverpool’s season.
"I'd like to say how appreciative I am of the support of those who voted for me and the Football Writers' Association in general,” the Englishman said on his win.
"You only have to look at the past winners of it, a number of whom I've been blessed to play with here at Liverpool, like Stevie (Gerrard), Luis (Suarez) and Mo (Salah) to know how prestigious it is.
"But as grateful as I am I don't feel like I can accept this on my own.
"I don't feel like anything I've achieved this season or in fact during my whole career has been done on my own.
"I owe a lot to so many different people - but none more so than my current team-mates - who have just been incredible and deserve this every bit as much as I do.
"We've only achieved what we've achieved because every single member of our squad has been brilliant. And not just in matches. Not just in producing the moments that make the headlines and the back pages but every day in training."
Arsenal’s Vivianne Miedema, was named the FWA Women's Footballer of the Year earlier this month.