The 71-year-old broadcaster and University Challenge host said he has been receiving “excellent treatment” and that his symptoms are “currently mild”.
In a statement to the PA news agency, he said: “I can confirm I have recently been diagnosed with Parkinson’s disease.
"I am receiving excellent treatment and my symptoms are currently mild.
“I plan to continue broadcasting and writing for as long as they’ll have me and have written about my diagnosis in more detail for the June issue of the marvellous Saga Magazine.
“I will not be making any further comment.”
Born in Leeds Paxman started his career in 1972 on the BBC’s graduate trainee programme, working in local radio and reporting on the Troubles in Belfast.
Shortly after moving to London in 1977, he transferred from Tonight to investigative flagship programme Panorama, before stints on the Six O’Clock News and BBC One’s Breakfast Time.
He became a presenter of Newsnight in 1989, a position he held until June 2014, during which he interviewed high-profile figures from politics and culture.
Bowing out after 25 years in the job, Paxman presented a programme including an interview with then London mayor Boris Johnson, while they both rode a tandem bicycle.
Paxman has also presented University Challenge since 1994, making him the longest serving current quizmaster on UK TV.