This film used sound effects from Skywalker Sound, Hanna-Barbera, Warner Bros., Cartoon Trax Volume 1, The Premiere Edition Volume 1 and The General Series 6000.
Final Film
- BBC - BOING 1 (Heard once as Brad starts the RV.)
- Hollywoodedge, Airy Bubbles Wwet Po CRT018601 (Pop only.)
- Hollywoodedge, Big Slow Boinkboing CRT015801
- Hollywoodedge, Bottle Rocket 2 Picco PE098501
- Hollywoodedge, Chain Saw False Start PE196801 (Heard once in the Illumination Entertainment logo.)
- Hollywoodedge, Chimpanzee Screeche PE026201
- Hollywoodedge, Egg Crack Fry With Grease TE033001 (Frying only.)
- Hollywoodedge, Gooey Splat CRT052405
- Hollywoodedge, Goose Honks Geese Hon AT085801
- Hollywoodedge, Horse Whinny Excite AHS048901 (Used for Melvin.)
- Hollywoodedge, Lightning 08 CloseG SIG012601
- Hollywoodedge, Low Pitched Squeak CRT049301 (Heard when a female citizen pulls a thneed off her head.)
- Hollywoodedge, Metal Shovel Hit Dull PE355701
- Hollywoodedge, Oldsmobile Trunk Squ PE852405
- Hollywoodedge, Punch Body Hit 1 Thud PE100801
- Hollywoodedge, Quick Double Bell Di CRT015001
- Hollywoodedge, Quick Swish By Wligh CRT053907/Sound Ideas, CARTOON, WHIZZ - QUICK ZING 02
- Hollywoodedge, Raspberry Classic CRT050201
- Hollywoodedge, Screams 5 Woman Short PE133901
- Hollywoodedge, Single Gulp Wbubble CRT057001 (Heard once in a higher pitch.)
- Hollywoodedge, Single Large Bubble CRT056304
- Hollywoodedge, Small Tight Timpani CRT030302
- Hollywoodedge, Tree Cracks Splinter PE108201
- Hollywoodedge, Truck Backup Beeps In PE270801
- Hollywoodedge, Two Toned Heavy Metal CRT031803
- Hollywoodedge, Wet Splats Various CRT052303
- SKYWALKER ELECTRICAL POP SOUND
- SKYWALKER, FOOTSTEP - DONKEY'S FOOTSTEPS
- SKYWALKER LIGHTSABER SOUND
- SKYWALKER, INDUSTRY - HUGE MECHANICS PUMPING
- SKYWALKER, POP - BIG BUBBLE POP, FANTASY
- SKYWALKER PUNCHING SOUNDS
- SKYWALKER, TRAIN - POLAR EXPRESS CHUGGING
- SKYWALKER, WHISTLE - FALL DOWN, HIGH PLACES
- SKYWALKER, WOOD - TREE MOVING, CRUNCHING
- SoundDogs, Sirens - Tanker Classic Emergency Siren - MCU - Siren Blast Thirteen Times, Sounds Similar To Old Model A Car Horns, But Lower & Louder, Aah Oooooh Gaaaag/Sound Ideas, HORN, KLAXON - SUBMARINE KLAXON: SEVERAL 01 (Heard once as Brad starts the RV.)
- Sound Ideas, AIRPLANE, SKID - LANDING TIRE SQUEAL 03
- Sound Ideas, AIRPLANE, SKID - LANDING TIRE SQUEAL 04
- Sound Ideas, AUTO, SKID - BRAKE SKID, TIRE 02
- Sound Ideas, BIRD, CROW - COMMON CROW: CALLS, ANIMAL
- Sound Ideas, BOING, CARTOON - HOYT'S BOING
- Sound Ideas, BOINK, CARTOON - BOINK 01
- Sound Ideas, CARTOON, SQUEAK - LONG, SLOW SHRILL WINDOW SQUEAK
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: FAST SLIDE UP, ZIP 01
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: FAST ZIP DOWN
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: FAST ZIP UP
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: QUICK ZIP UP
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: ZIP UP
- Sound Ideas, CARTOON, XYLOPHONE - WOOD XYLOPHONE GLISS UP FAST, MUSIC, PERCUSSION 01?
- Sound Ideas, DONKEY - C.U. BRAY, ANIMAL (Used for Melvin.)
- Sound Ideas, HIT, CARTOON - COCONUT HIT 01 (high pitched)
- Sound Ideas, HIT, CARTOON - COCONUT HIT 02 (high pitched)
- Sound Ideas, HORN, CARTOON - OLD BULB HORN (1st honk was only heard as the Once-Ler pokes the Lorax's nose.)
- Sound Ideas, HORROR - 'INSIDES' SPLAT, HUMAN 01
- Sound Ideas, HUMAN, CRACK - KNUCKLES: FAST CRACKING
- Sound Ideas, METAL, HIT - METAL IMPACT: SHARP RIPPING CRUNCH 02/SoundDogs, Metal, Rip, Crush, Hit, Glass
- Sound Ideas, REFRIGERATOR, DOOR - FULL REFRIGERATOR: OPEN DOOR, CONTENTS, RATTLE 01
- Sound Ideas, STRETCH, CARTOON - RUBBER STRETCH, LONG
- Sound Ideas, TOY - HORN: SINGLE SQUEAK
- Sound Ideas, TWANG, CARTOON - HOYT'S BOW TWANG
- Sound Ideas, TWANG, CARTOON - METALLIC RULER VIBRATE (low volume)
- Sound Ideas, WHINE, CARTOON - SHELL SCREAMING WHINE DOWN (Heard once as saliva drops on the Once-ler's face, shortened and followed by a similar whistle.)