Note: these aren't that funny. But I like that there's a place to put funny things, so maybe it will improve over time.
"Subpar Parks" National Park posters created using disguntled yelp reviews
Alternative Names for Animals
(Best viewed as a slideshow — click the link below and then click the right arrow to go through the list)
"The New Old People Are Going to Suck"
Calvin and Hobbes
Best of BBC "Funny Talking Animals - Walk on the Wild Side"
The Onion
Live from Snacktime
Kids’ quotes
Maru: a story of a cat and his boxes
Dogs catching treats
Even though I have pretty major anxiety about things going wrong (especially in preventable ways), these somehow still hit my funnybone.
Upset Toddlers
Autocorrect Fails
(it's kinda sad that phones got so much better at guessing what we were trying to say...)
Kitchen Disasters
Pinterest Fails
See also: Sources of amusement listed amongst my favorites on the Entertainment page. e.g. David Sedaris, xkcd, strange planet, Carpool Karaoke, etc.