| 1971 - | • Construction of Worlds of Fun Begins. |
| 1973 - | • Worlds of Fun Opens on May 26th! |
| 1974 - | • The Forum Amphitheater in Americana Opens • Worlds of Fun Hosts its One Millionth Guest |
| 1976 - | • America's Bicentennial Anniversary • The Screamroller Added to Americana • Bicentennial Square Added to Americana |
| 1977 - | • Singapore Sling (Bamboozler) Added to The Orient • Wobble Wheel Added to Americana • Bounce-A-Roos Added to Europa • Nairobi Nigel's Pygmy Playhouse added to Africa • Half Pint's Peak Added to Scaninavia |
| 1978 - | • The Aerodrome is Added to Americana • The Barnstormer Biplane Ride is added to Aerodrome • Red Baron moved to Aerodrome • Boat Tank (Tot's Yachts) added to Scandinavia • Game Street U.S.A added to Americana • The Safari is Removed |
| 1979 - | • Le Carousel is Added to Europa • The Zulu Added to Africa • Beetle Bumps Added to The Orient • Pony Promenade Added to Americana • The Wingding is Added to the Aerodrome • Funicular moved to Africa; renamed Silly Serpent |
| 1980 - | • Singapore Sling Moved to Americana; Renamed Whirligig • The Orient Express is Added to The Orient • Nairobi Nigel's Pygmy Playhouse is Removed • The Wingding is Removed |
| 1981 - | • The Incredi-Dome is Added to the Aerodrome • Casbah Games is Added to Africa |
| 1982 - | Worlds of Fun Celebrates its 10th Anniversary! • Oceans of Fun opens on May 22nd! • River City is Added to Americana • River City Rampage (Fjord Fjarlene) is Added to River City • Country Junction, a 1000 seat amphitheater is added. |
| 1983 - | • Screamroller Converted to USA's 1st Stand-Up Coaster • The Starbeam Music Machine opens in the Tivoli Theatre • The Barnstormer Biplane Ride is Removed |
| 1984 - | • Fury of the Nile Added to Africa • Extremeroller Converted Back into Sit-Down Coaster • Octopus Moved to the Aerodrome; Renamed Tail-Spinner • The Schussboomer is Removed |
| 1985 - | • "Stax of Wax" premiers in the Moulin Rouge Theatre • The Haunted Theatre Show premiers in Tivoli Music Hall |
| 1986 - | • Omegatron Added to Americana • Half Pint's Peak is Removed • The Aerodrome is Removed • Whirligig moved to The Orient; renamed Bamboozler |
| 1987 - | • Pandamonium! childrens' area opens • The Sky High/Sky Heis are Removed • Silly Serpent is Removed |
| 1988 - | • Worlds of Fun Celebrates 20 Million Guests • Python Plunge is Added to Africa • The Screamroller is Removed • Tivoli Picnic Terraces Added to Scandinavia |
| 1989 - | • Timber Wolf wooden coaster is added to Americana |
| 1991 - | • Beat Street is Added to Americana, replacing River City • Timber Wolf is best wooden coaster in the World • Fjord Fjarlane Moved to Scandinavia |
| 1992 - | • Worlds of Fun Celebrates its 20th Anniversary • Monsoon is Added • WOF and OOF are joined via Same Day Gateway |
| 1993 - | • Wacky Worm is Added to Pandamonium! • The Victrix Firing Range is Removed • Wobble Wheel is Removed |
| 1994 - | • Sea Dragon is Added to Scandinavia |
| 1995 - | • Cedar Fair L.P. buys WOF & OOF from Hunt Midwest • Cyclone Sam's is Added to Americana • The Cotton Blossom is Removed • Tram Rides are Discontinued • The Floral Clock is Removed • Marionette Show is Removed |
| 1996 - | • Detonator is Added to Americana • The RipCord is Added to Americana • Pandamonium! is Removed • "Fins & Flippers" Canceled • Octopus is removed |
| 1997 - | • Worlds of Fun Celebrates its 25th Anniversary • Bearenstain Bear Country is Added • Summer Spectacular Premiers in the Forum • Zambezi Zinger is Removed • The Incred-O-Dome is Removed • Americana Entrance is Closed |
| 1998 - | • The Largest Addition to Date, Mamba is Added to Africa • Octopus is reinstalled in Scandinavia • The Scrambler is Moved to Americana |
| 1999 - | • Grand Prix Raceway added to Americana • Coasters Midway Grill opens in Africa • "Stax of Trax" debuts in the Moulin Rouge • Forum Amphitheater re-named Heart of America Theater • The Plunge is closed at end of season • HalloWeekends debuts • Hurricane Falls opens at OOF • Steadman Plaza Removed • The Oriental Arch is removed |
| 2000 - | • Boomerang is added to Africa • The Rock opens in Americana • Bearenstain Bear Country Removed • Either Oar Removed |
| 2001 - | • Camp Snoopy Added to Americana • Steadman Plaza Added • Camp Bus, Woodstock's AirMail and Snoopy Bounce added • Omegatron removed |
| 2002 - |
• Worlds of Fun celebrates it's 30th Anniversary • Thunder Hawk added • "Otta Sync", a traveling musical band, premiers at the park. |
| 2003 - |
• Paradise Falls opens at Oceans of Fun • The Orient Express is removed • The Aquatic Arena (formerly the Dolphin Pool) is removed • Carnival of Carnivorous Clowns and House on Boo Hill are added to Halloweekends |
| 2004 - |
• Spinning Dragons is added to the Orient. • Camp Gonna Gitcha, The Fright Zone and Lore of the Vampire are added to Halloweekends |
| 2005 - |
• Worlds of Fun Village opens as the park's first on-site lodging • Peanuts Playhouse added to Camp Snoopy • Rockin' Reeler Removed • Dominion of Doom and Slash are added to Halloweekends |
| 2006 - |
• The largest capital expenditure to date, Patriot is added to Americana • Asylum Island is added to Halloweekends |
| 2007 - |
• Bloodshed added to Halloween Haunt • Halloweekends is renamed Halloween Haunt |
| 2008 - |
• Worlds of Fun celebrates its 35th Anniversary • Master McCarthy's Doll Factory added to Halloween Haunt • Outlaws Revenge added to Halloween Haunt • The Concert Series returns as part of the new Celebrate America Festival • The Oktoberfest Festival returns to the park. |
| 2009 - |
• Prowler is added to the African section. • Overlord's Awakening added to Halloween Haunt. |
| 2010 - |
• Snoopy's Hot Summer Lights premiers in the Europa and Africa Midways. • Cornstalkers replaces Camp Gonna Gitcha during Halloween Haunt. |
| 2011 - |
• Planet Snoopy replaces Camp Snoopy in Americana. • The Grand Carousel is added to Scandinavia. |