1999–2009 (channel), 2015–2019 (online), 2024 (tentative)
Wordmark
Logo without smile
.svg "Noggin (Gray).svg (7 KB)")
Gray version
Light blue/orange/blue version
white/lavender/dark purple version
Wow! Wow! Wubbzy! version
Head Clan Blue version
Beaker version
.svg "Noggin 1999 (Print).svg (29 KB)")
Beaker print version
.svg "Noggin 1999 (Beaker II).svg (74 KB)")
Beaker version with Nickelodeon and CTW logos
.svg "Noggin 2000 (Talking).svg (36 KB)")
Talking version with Nickelodeon and Sesame Workshop logos
.svg "Noggin 2000 (Thinking).svg (42 KB)")
Thinking version with Nickelodeon and Sesame Workshop logos
Logo with bubbles
Logo with colored bubbles, as seen on a promo for Tweenies
Logo with a bird on top. This was one of the most common logos in the channel's later years.
Some later logos (mainly from 2006 onward) added the Nickelodeon logo, like this train logo.
.svg "Noggin 1999 (Ladybug).svg (19 KB)")
Ladybug logo
The logo with a Moose and Zee-era bird 
Used for Story Time
Book logo
Earth logo, used for A Walk in Your Shoes 
Logo with intersecting 3D cubes
Another bubbles-like logo, used on the official website from 1999-2002
HOME Noggin
Used for Club Noggin
The logo with Oobi
Dinosaur logo
Lion logo
.svg "Noggin 1999 (Man on Mountain).svg (76 KB)")
Logo with a hiker hiking a mountain
Logo with a butterfly
Logo with skyscrapers
Logo with gears, used for The Upside Down Show
Logo with flowers
On-screen bug used for holiday 1999-2002
Logo with a tree
Unknown logo, as seen on a promo for A Walk in Your Shoes that aired on Nickelodeon in December 2000
.png "Screenshot (46).png (156 KB)")
The logo with characters from Oobi
On-screen bug (with train)
On-screen bug (with flower), used during the Feetface era
.svg "Noggin 1999 (Flower).svg (25 KB)")
The logo with a flower
Another on-screen bug with flower, used from 1999 to April 6, 2003
Another on-screen bug with lion, used from April 1, 2002 to April 6, 2003
On-screen bug with autumn tree
Another on screen bug (with ladybug)
.jpg "Nogginonscreenbug(youtellme).jpg (4 KB)")
Another on-screen bug (Blue Noggin logo)
On-screen bug (with a pumpkin)
Another on screen bug (with spider)
Another on screen bug (with a blue ball)
On-screen bug (with autumn leaf)
Another on-screen bug (with crab)
Another on screen bug (with origami)
Another on screen bug (with soccer ball)
Another onscreen bug (with snowman)
Another onscreen bug (with turkey)
The logo with a snowman
Another snowman on screen bug
Another on-screen bug (used when the uncut version of Sesame Street episode 1396 aired on Noggin)
On screen bug (with flower) used for the Moose A Moose era.
On-screen bug (with boat)
Fish logo
Screen-bug with city
Screen-bug with beaker
Screen-bug used for the Hub-Bub
.svg "Noggin 1999 (Moose and Zee).svg (44 KB)")
The logo with Moose and Zee, used for the 2015 app
Horn screen bug
The logo with a house
Soccer Ball logo
My Noggin
Variant used before broadcasts of shows from the Nick Jr. block
Neon Green version (from the 2024 rebooting loading screen)
2019–2024
_00-00-04_.png "Blaze and the Monster Machines on Noggin (2019) 00-00-04 .png (407 KB)")
Blaze and the Monster Machines (Blaze)
_00-00-04_.png "Paw Patrol on Noggin (2019) 00-00-04 .png (741 KB)")
PAW Patrol (Skye and Chase)
Bubble Guppies (Gil and Molly)
Blue's Clues & You! (Blue and Josh)
"Made by Noggin" (used for original content on the app)