This is a list of the top 50 singles in 2009 in New Zealand, as listed by the Recording Industry Association of New Zealand (RIANZ).

Chart Smashproof's "Brother" was the longest-running song in 2009, peaked at number one in eleven weeks in a row. The Black Eyed Peas's "I Gotta Feeling" and Keri Hilson's "Knock You Down" behind "Brother" for longest-running at number one, with 9 weeks and 6 weeks. Beyoncé's "Halo" was the longest-running in the chart this year, spent 33 weeks inside the chart. Black Eyed Peas' "I Gotta Feeling" and Smashproof's "Brother" tied in the second place, with 29 weeks and Taylor Swift's "Love Story" in the third place with 27 weeks.

Keyp – Song of New Zealand originWhether or not a song is of New Zealand origin is determined by the RIANZ

Rank Artist Title 1 "I Gotta Feeling"from the album, The E.N.D. 2 Smashproof featuring Gin Wigmore "Brother"† from the album, The Weekend 3 featuring Akon "Sexy Bitch" from the album, One Love 4 Ke$ha "Tik Tok"from the album, Animal 5 "Boom Boom Pow" from the album, The E.N.D. 6 "I'm Yours"from the album, We Sing, We Dance, We Steal Things 7 Flo Rida featuring Ke$ha "Right Round"from the album, R.O.O.T.S. 8 "Halo"from the album, I Am... Sasha Fierce 9 "Sweet Dreams"from the album, I Am... Sasha Fierce 10 featuring Kanye West & Ne-Yo "Knock You Down"from the album, In a Perfect World... 11 "Whatcha Say"from the album, Jason Derulo 12 featuring Lil Wayne "Down"from the album, All or Nothing 13 "Love Story" 14 Soulja Boy Tell 'Em featuring Sammie "Kiss Me Thru the Phone"from the album, ISouljaBoyTellem 15 Lady Gaga "Poker Face"from the album, The Fame 16 featuring The Pussycat Dolls "Jai Ho"from the Slumdog Millionaire soundtrack 17 "Party in the U.S.A."from the extended play, the Time Of Our Lives 18 Cobra Starship featuring Leighton Meester "Good Girls Go Bad"from the album, Hot Mess 19 "Black Box"†from the album, Introducing... Stan Walker 20 Pitbull "I Know You Want Me (Calle Ocho)"from the album, Rebelution 21 T.I. featuring Justin Timberlake "Dead and Gone"from the album, Paper Trail 22 Cascadafeaturing Carlprit "Evacuate the Dancefloor"from the album, Evacuate the Dancefloor 23 Linkin Park "New Divide"from the Transformers: Revenge of the Fallen soundtrack 24 J Williams "Ghetto Flower"†from the album, Young Love 25 "You Belong with Me"from the album, Fearless 26 Owl City "Fireflies"from the album, Ocean Eyes 27 Eminem "We Made You"from the album, Relapse 28 "Meet Me Halfway"from the album, The E.N.D. 29 Lady Gaga "Bad Romance"from the album, The Fame Monster 30 "Oh My"†from the album, Holy Smoke 31 "Single Ladies (Put a Ring on It)"from the album, I Am... Sasha Fierce 32 Kids of 88 "My House"†from the album, Sugarpills 33 "Battlefield"from the album, Battlefield 34 Savage featuring Baby Bash "Wild Out (Chooo Hooo)"†from the album, Savage Island 35 Basshunterfeaturing DJ Mental Theo's Bazzheadz "Now You're Gone"from the album, Now You're Gone – The Album 36 featuring Kelly Rowland "When Love Takes Over"from the albums, One Love & Here I Am 37 "Always on My Mind"†from the album, Past, Present, Future 38 Green Day "21 Guns"from the album, 21st Century Breakdown 39 J Williams featuring Lavina Williams "Stand with You"†from the album, Young Love 40 Eminem "Beautiful"from the album, Relapse 41 Lady Gaga "Paparazzi"from the album, The Fame 42 Ladyhawke "My Delirium"†from the album, Ladyhawke 43 "The Climb"from the Hannah Montana: The Movie soundtrack 44 "Rock & Roll"from the album, Sounds Like This 45 Nesian Mystik "Mr Mista"†from the album, Elevator Musiq 46 Akon featuring Colby O'Donis & Kardinal Offishall "Beautiful"from the album, Freedom 47 Kings of Leon "Use Somebody"from the album, Only By The Night 48 Evermore "Hey Boys & Girls (Truth of the World Part 2)"†from the album, Truth Of The World: Welcome To The Show 49 Midnight Youth "All On Our Own"†from the album, The Brave Don't Run 50 Smashproof "Ordinary Life"†from the album, The Weekend

Top 20 singles of 2009 by New Zealand artists

Rank Artist Title 1 Smashproof featuring Gin Wigmore "Brother" 2 Stan Walker "Black Box" 3 J. Williams "Ghetto Flower" 4 Gin Wigmore "Oh My" 5 Kids of 88 "My House" 6 Savage featuring Baby Bash "Wild Out (Chooo Hooo)" 7 Tiki Taane "Always on My Mind" 8 J. Williams featuring Lavina Williams "Stand with You" 9 Ladyhawke "My Delirium" 10 Nesian Mystik "Mr Mista" 11 Evermore "Hey Boys & Girls (Truth of the World Part 2)" 12 Midnight Youth "All On Our Own" 13 Smashproof "Ordinary Life"

*Numbers 14 to 20 are currently unavailable

Notes

References The Official NZ Music Chart, RIANZ website