The first season of the television series Jonas was aired on Disney Channel from May 2, 2009, to March 14, 2010, and included 21 episodes. It introduces the six main characters of the series and follows the Jonas Brothers as they live pop star lives and deal with ordinary teenage problems.
 The season's soundtrack was never officially released. The season itself was released on DVD in two volumes: "JONAS: Rockin' The House", released on September 22, 2009, and "I Heart JONAS", released on January 26, 2010, both by Disney DVD. Three volumes making up the entire first season of JONAS were released on Region 2 DVD in the United Kingdom and Region 4 in Australia. The three new titles being: "Rockstars In the House", "Ready To Rock" and "Keeping It Real".
 This season was set in New Jersey, before the setting changed to Los Angeles for the second season and was shot at Hollywood Center Studios, which has also been the home to several other Disney Channel sitcoms over the years including The Suite Life on Deck and Wizards of Waverly Place. This is the first original series on the channel to be broadcast in high definition since its first season.
 The theme song for JONAS is "Live to Party", performed by the Jonas Brothers (as JONAS). The song's lyrics describe the basic premise of the television series – the Jonas' lifestyle.
 The full-length version, which is 2 minutes, 55 seconds in length, was included on Disney Channel Playlist, the video game "JONAS" and a UK bonus track for the band's third album, A Little Bit Longer. For the TV version of the theme, which lasts only 50 seconds, only the first two stanzas and the last two were used.
 The opening sequence shows the main cast members as the Jonas perform a song, with the creator's names appearing in the second-to-last part. The show's title logo design appears at the end of the sequence.
 Nicole Anderson also auditioned for the role of Stella, but actress Chelsea Staub ended up winning the part. According to Staub, her previous work with director Sean McNamara helped her land the role. After the series plot changed, producers decided to create a best friend for Stella and offered Anderson, Staub's real life best friend, the role of Macy.
 JONAS was intended to star Kevin, Nick, and Joe Jonas, who lend their first names to their television counterparts. The role of Frankie Lucas was also created with Frankie Jonas in mind. In addition, Robert "Big Rob" Feggans, the Jonas Brothers real-life head of security, plays The Big Man, the JONAS bodyguard.
 Kevin and Joe warn Nick that he's falling too fast for his crush, Penny, but Nick doesn't listen to them. Nick then becomes heartbroken when he hears Penny singing the love song, that he wrote especially for her, to her boyfriend. Meanwhile, Stella creates a new line of clothing called Stellcro and uses Macy to test it.
 Jonas Songs featured: "Give Love a Try" 
 After ruining their mom’s home videos on her birthday, the boys feel very sorry. So, they decided to reenact all the scenes.
 Guest Stars: Rebecca Creskoff as Sandy, Frankie Jonas as Frankie
Absent: Nicole Anderson as Macy Misa
 The guys all fall for their pizza delivery girl and they break their JONAS code by competing with each other to see who gets the girl.
 Jonas Songs featured: "Pizza Girl"
Guest Stars: Rebecca Creskoff as Sandy, Frankie Jonas as Frankie and Scheana Marie Jancan as Maria
 The boys try to impress their mom by doing normal chores, but are unable to do so because of screaming fans.
 Jonas Songs featured: "Keep It Real" 
 Joe's childhood friend Carl comes to visit them, but manipulates their popularity for his own gain so they teach him a lesson. Meanwhile, Stella is furious with Macy for using the money she lent her to buy a collector potato chip that has a resemblance to Joe.
 Jonas Songs featured: "We Got To Work It Out" 
 When Kevin allows Macy to be a backup singer after their normal backup singer falls ill, he is put in an awkward situation when Macy turns out to be tone deaf. Meanwhile, Frankie designs a T-shirt for the JONAS merchandise, but in only features himself.
 Jonas Songs featured: "Keep It Real" 
 Joe gets jealous when Stella goes on a date with Van Dyke, so he calls for an emergency fashion meeting, ruining Stella's date. In turn, Stella gives Joe a bad outfit to wear when meeting the Queen of the United Kingdom. 
 Jonas Songs featured: "Tell Me Why" 
 Joe finds that it is rough being a member of JONAS when he develops a crush on a cello player who dislikes rock stars, so he decides to play the triangle in the orchestra. Meanwhile, Macy and Stella have a bet on who can go longest minus their so called obsessions. (Macy can't say JONAS and Stella can't text.) 
 Jonas Songs featured: "Blue Danube" (Rock version) 
Guest Stars: Peter MacKenzie as Mr. Phelps and Mariah Buzolin as Angelina 
 Nick experiences writer's block as part of a really bad day. When he falls asleep, he dreams of writing a great song but can't remember it once he wakes up, so Joe and Kevin try to re-create Nick's bad day to so that he will be able to dream his great song again. 
 Jonas Songs featured: "I Did It All Again" 
Guest Star: Samantha Boscarino as Amy 
 Joe questions his relationship with Stella when invited to a fashion event. Meanwhile, Macy accepts a date with Randolph and decides to make him into a "Nick clone". 
 Jonas Songs featured: "Love Sick" 
 The members of JONAS try their hand at acting in a school production of the Three Musketeers. Joe then becomes jealous after finding out that Van Dyke Tosh, who fills in for Joe due to stage fright, is Stella's love interest. Meanwhile, Macy tries to find her lucky charm bracelet with the help of Kevin.
 Jonas Songs featured: "Tell Me Why" 
 A magazine linked Joe in a relationship with a celebrity named Fiona Skye. When Fiona begins to follow Joe, he and his brothers realize that something must be done.
 A teacher lets Joe slide on an accident with a fire alarm, but gives his friend Abby detention for the same mistake. Meanwhile, Stella struggles with her grade in P.E. class.
 Jonas Songs featured: "Tell Me Why" and "Keep It Real" 
Guest Stars: Tangelia Rouse as Mrs. Snark, Carly Lang as Abby, and Bob Glouberman as Mr. Spencer 
 For their 15th Friendship Anniversary, Joe suggests to throw a party for Stella and enlists the help of Macy, but Stella gets suspicious when she sees Joe and Macy snooping behind her back. Meanwhile Nick and Kevin bet who's better at Hackeysack and Kevin takes a kung-fu twist to the competition.
 Kevin, Joe and Nick are left home alone for a week and they try to behave and impress their parents, but when Frankie throws a party, their plans go into a tailspin. Meanwhile, Stella unwittingly "takes control" of the JONAS fan club from Macy.
 When Joe, Nick, and Kevin forget Stella's birthday, they try to plan her another one, but schedule it at the same time as a "big interview".
 Jonas Songs featured: "Time Is On Our Side" 
 When Kevin thinks there is a ghost in the firehouse, he enlists Stella, Joe and Nick to help him find it.
 Absent: Nicole Anderson as Macy Misa 
 Van Dyke asks Stella on a date to El Meat, a new, all-meat restaurant, and a jealous Joe crashes the date with Macy, in order to keep an eye on Stella. Meanwhile, Kevin has an addiction to Nick's cookies and Nick tries to teach Kevin a lesson about self-control.
 Guest star: Chuck Hittinger as Van Dyke Tosh 
 Kevin's old girlfriend, Anya has joined the school, but the kids in school make fun of her because they find her eccentric. Meanwhile, Joe, Nick, Stella and Macy try to find out who has been taking picture of Jonas and uploading it on Macy's website.
 Jonas Songs featured: "I Left My Heart in Scandinavia" 
Guest Star: Madison Riley as Anya 
 The boys are the judges of a beauty contest that Stella decides to be a part of, but she ends up humiliating herself.
 Jonas Songs featured: "We Got To Work It Out" 
Guest Stars: Mark DeCarlo as himself, Cindy Ambuehl as Maggie Belle, and Chelsea Harris as Carrie Sue 
Absent: Nicole Anderson as Macy Misa 
Title Reference: Beauty and the Beast
Event Allusion: Miss Teen South Carolina USA 2007 Caitlin Upton answering her final question in a strange and grammarless manner at the Miss Teen USA 2007 beauty pageant.  
 As the JONAS World Concert Tour draws closer, Joe and Stella come to terms with being apart from one another over the summer. Meanwhile, Kevin and Joe devise a plan to help Nick ace his geometry test after their dad threatens not to send the brothers on tour unless they pass all of their school exams. Macy narrates throughout the episode.
 Jonas Songs featured: "Time Is On Our Side", "Love Sick", "Give Love a Try", "Scandinavia" (new version), "Work It Out", and "Keep It Real"