The classic KISS members are all in their 70s and late 60s now, with some later members a bit younger. Their exact ages depend on the specific year you’re asking about, but their birthdates are fixed and well known.

Below is an overview using their birth years so you can easily work out their exact current age for any year.

Original 1970s KISS lineup

  • Gene Simmons (bass, vocals)
    • Born August 25, 1949, in Haifa, Israel.
* Co‑founded KISS in 1973 and became one of rock’s most recognizable figures with his Demon persona.
  • Paul Stanley (rhythm guitar, vocals)
    • Born January 20, 1952, in New York City.
* Co‑founder and long‑time frontman, known for the Starchild persona and leading the band’s songwriting.
  • Ace Frehley (lead guitar, vocals)
    • Born April 27, 1951, in the Bronx, New York.
* Original “Spaceman” guitarist whose style helped define the band’s 1970s sound.
  • Peter Criss (drums, vocals)
    • Born December 20, 1945, in Brooklyn, New York.
* Original “Catman” drummer and singer on hits like “Beth.”

Long‑time later members

  • Eric Singer (drums)
    • Born May 12, 1958, in Cleveland, Ohio.
* Joined KISS in the early 1990s and later took on the Catman makeup once Peter Criss left again.
  • Tommy Thayer (lead guitar)
    • Born November 7, 1960, in Beaverton, Oregon.
* Became KISS’s lead guitarist in the 2000s, using the Spaceman persona onstage.

Other notable former members

  • Vinnie Vincent (lead guitar)
    • Born August 6, 1952, in Bridgeport, Connecticut.
* Joined in 1982 as a replacement for Ace Frehley and used the “Ankh Warrior” character.
  • Mark St. John (lead guitar, deceased)
    • Born February 7, 1956, in Hollywood, California.
* Briefly played with KISS in 1984 before leaving due to health issues.
  • Bruce Kulick (lead guitar)
    • Born December 12, 1953, in Brooklyn, New York.
* Guitarist through much of the non‑makeup era in the 1980s and early 1990s.

Quick HTML table of birthdates

[3] [5][3] [3] [5][3] [3] [5][3] [3] [5][3] [1][3] [1][3] [1][3] [1][3] [9][3] [9][3] [9][3] [9][3] [3][9] [9][3]
Member Role in KISS Date of birth Notes
Gene Simmons Bass, vocals August 25, 1949 Co‑founder, “Demon” persona
Paul Stanley Rhythm guitar, vocals January 20, 1952 Co‑founder, “Starchild” persona
Ace Frehley Lead guitar April 27, 1951 Original “Spaceman” guitarist
Peter Criss Drums, vocals December 20, 1945 Original “Catman” drummer
Eric Singer Drums May 12, 1958 Joined 1990s; later Catman onstage
Tommy Thayer Lead guitar November 7, 1960 Current “Spaceman” guitarist
Vinnie Vincent Lead guitar August 6, 1952 “Ankh Warrior” era guitarist
Mark St. John Lead guitar February 7, 1956 Brief 1984 lineup member
Bruce Kulick Lead guitar December 12, 1953 Non‑makeup era guitarist
**Note:** To get their _exact_ age right now, subtract the birth year above from the current year and adjust by whether their birthday has passed yet this year.

Information gathered from public forums or data available on the internet and portrayed here.