The Reds won their first league title in 30 years, lifting the Premier League after a remarkable season.
They finished 99 points and won the league at a canter, and Ferdinand believes Van Dijk is a key reason for the team's success.
Liverpool kept 15 clean sheets in the league this season.
Speaking on the Beautiful Game Podcast, Ferdinand said: "I love him. I think he's the best in the world right now.
"He's undoubtedly a top player but I think he's not fighting against the depth of other central defenders that was in my era.
"If we were talking about top drawer centre-halves, I could name five, six, seven, eight, nine in my era, whereas I don't think I could fill my whole hand in this era.
"And that's no disrespect [to the current defenders] but we're talking about top players here.
"Though I think in any era, he looks like a top player."