Apparently, no date of death being given. Wow!
Here’s a curious thing: While he did a bit about “Clementine,” speculating about what the song “with no recognizable merit whatsoever” would have been if various non-folk musicians had done it, he appears to have completely overlooked the fact that “Clementine” scans perfectly to Beethoven’s or Schiller’s (or one of that crowd’s) “Ode to Joy”.
He is about the same age as the king of Thailand, so he is just a pup.
The secret to his long life - he’s never been married. 
Lehrer is going to die on the front page of the Times, I’m sure. They still refer to his songs in headlines.
Many, many, MANY fine moments in my life were had listening to Mr. Lehrer’s performances. I’m not sure a single week went by without Dr. Demento playing one or another of his songs back in the late '70s and early '80s, and since my friends and I taped Dr. D’s shows every week, we all soon amassed quite a collection of Mr. Lehrer’s tunes.
Whatever he got from Agnes, I want some of that. Appears to extend life.
The burning question is: after all those years, are there any pigeons left in the park?
They’re both “only” 87. The one – in a different creative field from Lehrer – whom I marvel at, is Herman Wouk (Caine Mutiny,Winds of War, etc.) : still with us at 100.
For all his great lyrics, perhaps his best line (one of the most brilliant I’ve ever heard) is:
Well, the rest of us are still alive aren’t we? As he said, we will all go together when we go.
For now, he’s still got copious free time.
He put out a DVD of his performances, The Tom Lehrer Collection, the bulk of which apparently first surfaced on YouTube. There’s a little blurb in the booklet where he describes writing to the uploader of the video (aren’t you supposed to ask my permission?) - and that person’s amazement that he’s still alive.
Rather weirdly, the only official promotional film ever made for one of his songs (Pollution) doesn’t appear on the DVD… So, perhaps he’s holding things back for another release. Maybe a 90th birthday gala?
George Burns lived to be 100 - and had a gig booked for his birthday, although I don’t think it happened as planned.
When Mozart was his age, he had been dead for 52 years.
Damn! I lost my virginity one cold September night at a Renaissance festival with a bunch of guys singing Tom Lehrer around a campfire in the background! :o
Less than a year later, I was at a folk festival on the Isle of Man, and a duo sang “Masochism Tango” to thunderous applause. The Brits really do love his music! (Or at least they did, back in the '70s. Don’t know about today.)
Way to go, Tom! 
And covering another creative medium, there’s Mort Walker. He’s 92 years old and he’s been doing Beetle Bailey for 65 years.
FYI, a couple of years ago, I saw Daniel Radcliffe (star of the Harry Potter films) performing The Elements song on Graham Norton’s chat show.
Having the excuse of not being American: I’d never heard of Walker / Bailey – Googling was needed. Beetle Bailey certainly seems like delightfully daft military fun – and, 65 years !! (I love the general “nonsense factor” of series / characters “frozen in time”; a favourite – whom I’ve probably mentioned before – Richmal Crompton’s naughty-schoolboy [anti]-hero William Brown: he stayed at the same age of 11 / 12, and his family remained in parallel at their same ages, approx. 1923 – 1963.)
Well, like most long-running comic strips, Beetle Bailey mostly just re-uses the same gags repeatedly, any more. If you’re just starting reading it, it might seem fresh for a little while, but after a while, you read it out of habit, not for the laughs.
Back on topic, is Lehrer still creating any new works? I find it hard to believe that he’s gone completely cold turkey, but I don’t think I’ve seen anything from him more recent than the 70s.
And in all that time, Beetle Bailey has never gone to war.
The A.V. Club interviewed him back in 2000. I thought it was more recent than that, but I guess not. It’s worth a read. He never really thought of himself as a comedian. The songs were just something he did on the side to amuse his friends.
He was really an academic, not retiring until 2001. He taught polysci, math – and musical theater.
Given the rather large family of ‘ballad meter’ songs whose lyrics can be sung to each other’s tunes (including “Amazing Grace” and “Pop Goes the Weasel”) that certainly has no bearing on a song’s merits. 