The announcement was made by John Cena on Twitter, who was at a USA Network season premiere event in New York City.
WWE Chairman and CEO Vince McMahon said: "WWE is proud to celebrate this historic milestone with our partners at USA Network. Our new three-hour Raw represents the next generation in interactive television where our fans won't just watch the show, they will help create it."
The "WWE Universe" will get to be involved through WWE.com and social media by deciding matches, stipulations, superstar development and more.
Chris McCumber and Jeff Wachtel, co-presidents of USA Network, added: "The WWE Universe is one of the most socially active and passionate fan bases in all of television. The powerful three-hour block of live TV truly makes USA the year-round destination for young male viewers on Monday nights."
Meanwhile, several WWE superstars have posted their thoughts on the matter on Twitter.
John Laurinaitis: "After I defeat @JohnCena at #OverTheLimit, I can look forward to another hour of #PeoplePower beginning on July 23. #3HourRaw As many of you have noted, the odds of me actually making it to #3HourRaw are slimmer than ever after the Board's decision Monday. Although I'm a fighter, I'll need the support of the entire WWE Universe to overcome such unfair circumstances at #OverTheLimit. As always, I'm trying to stand tall in the face of adversity. The prospect of #3HourRaw is helping me persevere in these dark times."
David Otunga: "RAW is 3 hours! An additional 3,600 secs @WWEUniverse gets to enjoy looking at the greatest physique in @WWE #3HourRAW"
Dolph Ziggler: "@JohnCena: STARTING Monday Night July 23 @USA_Network ADDS A 3RD HOUR TO @WWE MONDAY NIGHT RAW - PERMANENTLY #3hourRaw" -my time! i challenge ANY @WWE #wwe SUPERSTAR to an #IronManMatch July 23rd! #3hourRaw #ShowStolen #AnyTAKERs?"
Justin Gabriel: "#3HourRaw yes! Stoked. I hope that my people in Africa will get more than the Hour of RAW and SD now!"
Road Dogg: "Well the cats out of the bag! Soon we go 3 hours on Mondays! More entertainment for your viewing pleasure! #3hourRaw #OUDK"
Titus O'Neil: "Well @WWE #RAW goes to 3hrs in July!! Looks like Me& @DarrenYoungWWE will have 2take Over Raw too!! #TagChampsSoon #MillionsofDollars"
Tyson Kidd: "Raw moving to 3 hours? I see nothing but great stuff coming from this"
Ricardo Rodriguez: "#3hourRAW ?! More time for meeee.. I mean more time for Aaaaalllbbbeeerrrtoooooooo Deeeeeeeeel Rrrrrriooooooooo!"
Wade Barrett: "I will shortly furnish you with the thoughts of my client, Mr. Barrett, concerning #3HourRaw. Regards, Peter Lazarou, Esq. I have just got off the line with my client, Mr. Barrett, after discussing his thoughts on #3HourRaw. Regards, Peter Lazarou, Esq."
Ezekiel Jackson: "3 hours of Raw..permanently. Domination of Monday Nights by Raw and Zeke...
Cameron: "More entertainment! More wrestling starting July 23 where there will now be 3 hrs of raw! More time to get funky! Funk yes! #3HourRaw
Heath Slater: "Raw will soon be going 3 hours. Wooo!!! More Heath Slater #3HourRaw"
Howard Finkel: "On Monday, July 23....#WWE Raw becomes a 3 hour program on @USA_Network!! To me, great news for everyone!! Interested to know ur thoughts..."
Yoshi Tatsu: "#3HourRaw #YoshiRevolution"
Santino Marella: "3 hrs of Raw!!!! Is that just one hour more of Santino or everyone else too? #3hourRaw"
Alex Riley: "Starting July 23rd Monday Night is #GoinA-Ry! Translation- adding a permanent 3rd Hr! If you got a problem with that u can #SayItToMyFace"
Zack Ryder: "#3HourRaw starting July 23...#SSSIIICCCKKK"
Kofi Kingston: "What do y'all think about the new #3HourRaw?"
Layla: "Whoop whoop!!! So excited for three hour raw on USA #3hourRaw @WWE"
Curt Hawkins: "#3HourRaw ...I'm in."
Eve Torres: "Spoken like a true leader. RT @WWERawGM As always,trying 2 stand tall in face of adversity.The prospect of #3HourRaw is helping me persevere"