In New Zealand, the Recording Industry Association of New Zealand (RIANZ) compiles the top forty singles chart each week. Sales of songs determined 75% of the sorting information, and radio airplay figures were responsible for 25%. From 18 April 2004 to 29 May 2007 the sales/radio airplay split was 50:50. Downloads of songs were included from 29 May 2007. The reporting period is from Monday to Sunday, with the week's chart published the next Monday. Before 18 April 2004, the chart week was from Sunday to Saturday, with the chart published on Sunday. Afterwards, the chart week was from Monday to Sunday, with the charts published on Monday. This meant there was a one-day charting period for 18 April 2004, with the next chart published on 19 April 2004. As a result, Usher spent three weeks and one day at number one with "Yeah!" instead of four complete weeks.

A total of 170 singles topped the chart in the 2000s, including 23 by New Zealand artists. Twenty artists had three or more number-one singles; the most successful was Akon, whose seven number-ones totalled twenty-three weeks on top of the chart. Chris Brown, Eminem, and the Black Eyed Peas each had five of their singles go to number one.

Scribe's double A-side "Stand Up"/"Not Many" spent the longest at number one, with twelve weeks. This is the most weeks at number one ever by a New Zealander, and the second most for any song, after Boney M.'s "Rivers of Babylon" had fourteen weeks in the top spot in 1978. "Axel F", by Crazy Frog, and "Brother", by Smashproof and Gin Wigmore each had eleven weeks at the top spot. "Brother" broke the record for the longest consecutive number-one reign by a New Zealand artist, previously set by "Sailing Away" by All of Us in 1986.

On 29 May 2006, "Crazy" by Gnarls Barkley replaced "Hips Don't Lie" by Shakira and Wyclef Jean at the top of the chart, and became the 500th number-one single in the RIANZ New Zealand Singles Chart's history.

The source for this decade is the Recorded Music NZ chart, the chart history of which can be found on the Recorded Music NZ website or Charts.nz.

– Number-one single of the yearAnnual charts are sourced from the RIANZ website: "Annual Top 50 Singles Chart 2010" – Song of New Zealand originWhether or not a song is of New Zealand origin is determined by the RMNZ – Number-one single of the year, of New Zealand origin

← 1990s 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010s →

2000

DateArtist SingleWeeks at number one2 JanuaryS Club 7"S Club Party"5 weeks (1 in 1999)9 January16 January23 January30 JanuaryMacy Gray"I Try"1 week6 FebruaryChristina Aguilera"What a Girl Wants"5 weeks13 FebruaryVengaboys"Kiss (When the Sun Don't Shine)"1 week20 FebruaryChristina Aguilera"What a Girl Wants"5 weeks27 FebruaryBeth Hart"L.A. Song (Out of This Town)"1 week5 MarchChristina Aguilera"What a Girl Wants"5 weeks12 March19 March26 MarchS Club 7"Two in a Million"1 week2 AprilMadison Avenue"Don't Call Me Baby"1 week9 April*NSYNC"Bye Bye Bye"1 week16 AprilVengaboys"Shalala Lala"3 weeks23 April30 April7 MayBardot"Poison"3 weeks14 May21 May28 MaySisqó"Thong Song"1 week4 JuneBritney Spears"Oops!... I Did It Again"1 week11 JuneMelanie C featuring Lisa "Left Eye" Lopes"Never Be the Same Again"3 weeks18 June25 June2 JulyAnastacia"I'm Outta Love"7 weeks9 July16 July23 July30 July6 August13 August20 AugustRobbie Williams"Rock DJ"4 weeks27 August3 September10 SeptemberBomfunk MC's"Freestyler"2 weeks17 SeptemberRobbie Williams"Rock DJ"4 weeks24 SeptemberBomfunk MC's"Freestyler"2 weeks1 OctoberMadonna"Music"1 week8 OctoberSpiller featuring Sophie Ellis-Bextor"Groovejet (If This Ain't Love)"7 weeks15 October22 October29 October5 November12 November19 November26 NovemberBaha Men"Who Let the Dogs Out?"2 weeks3 December10 DecemberSamantha Mumba"Gotta Tell You"1 week17 DecemberDestiny's Child"Independent Women Part I"1 week24 DecemberFur Patrol"Lydia"3 weeks31 December

2001

DateArtist SingleWeeks at number one7 JanuaryFur Patrol"Lydia"3 weeks14 JanuaryBackstreet Boys"Shape of My Heart"1 week21 JanuaryGwyneth Paltrow and Huey Lewis"Cruisin'"5 weeks28 January4 February11 February18 February25 FebruaryMadonna"Don't Tell Me"1 week4 MarchJennifer Lopez"Love Don't Cost a Thing"2 weeks11 March18 MarchRicky Martin with Christina Aguilera"Nobody Wants to Be Lonely"2 weeks25 MarchLeAnn Rimes"Can't Fight the Moonlight"2 weeks1 AprilRicky Martin with Christina Aguilera"Nobody Wants to Be Lonely"2 weeks8 AprilLeAnn Rimes"Can't Fight the Moonlight"2 weeks15 AprilAtomic Kitten"Whole Again"6 weeks22 April29 April6 May13 May20 May27 MayCraig David"Walking Away"2 weeks3 June10 JuneChristina Aguilera, Mýa, Lil' Kim and P!nk"Lady Marmalade"3 weeks17 June24 June1 JulyEmma Bunton"What Took You So Long?"1 week8 JulyUncle Kracker"Follow Me"1 week15 JulyHear'Say"Pure and Simple"5 weeks22 July29 July5 August12 August19 AugustBlue"All Rise"2 weeks26 AugustNelly Furtado"Turn Off the Light"2 weeks2 September9 SeptemberBlue"All Rise"2 weeks16 SeptemberGorillaz"19-2000"1 week23 SeptemberAtomic Kitten"Eternal Flame"1 week30 SeptemberRobbie Williams"Eternity"1 week7 OctoberAfroman"Because I Got High"3 weeks14 October21 October28 OctoberKylie Minogue"Can't Get You Out of My Head"3 weeks4 November11 November18 NovemberAlicia Keys"Fallin'"3 weeks25 NovemberBlue"Too Close"2 weeks2 December9 DecemberAlicia Keys"Fallin'"3 weeks16 December23 DecemberRobbie Williams and Nicole Kidman"Somethin' Stupid"4 weeks30 December

2002

DateArtist SingleWeeks at number one6 JanuaryRobbie Williams and Nicole Kidman"Somethin' Stupid"4 weeks13 January20 JanuaryP!nk"Get the Party Started"3 weeks27 January3 February10 FebruaryShakira"Whenever, Wherever"8 weeks17 February24 February3 March10 MarchAlex Lloyd"Amazing"1 week17 MarchShakira"Whenever, Wherever"8 weeks24 March31 March7 April14 AprilAlanis Morissette"Hands Clean"1 week21 AprilDarren Hayes"Insatiable"1 week28 AprilThe Calling"Wherever You Will Go"1 week5 MayP!nk"Don't Let Me Get Me"2 weeks12 MayGoodshirt"Sophie"1 week19 MayP!nk"Don't Let Me Get Me"2 weeks26 MayWolverines"65 Roses"1 week2 JuneEminem"Without Me"7 weeks9 June16 June23 June30 June7 July14 July21 JulyElvis vs. JXL"A Little Less Conversation"3 weeks28 July4 August11 AugustWyclef Jean featuring Claudette Ortiz"Two Wrongs"1 week18 AugustAvril Lavigne"Complicated"9 weeks25 August1 September8 September15 September22 September29 September6 October13 October20 OctoberAtomic Kitten"The Tide Is High (Get the Feeling)"4 weeks27 October3 November10 November17 NovemberLas Ketchup"The Ketchup Song (Aserejé)"10 weeks24 November1 December8 December15 December22 December29 December

2003

DateArtist SingleWeeks at number one5 JanuaryLas Ketchup"The Ketchup Song (Aserejé)"10 weeks12 January19 January26 JanuaryEminem"Lose Yourself"4 weeks2 February9 February16 FebruaryBig Brovaz"Nu Flow"1 week23 FebruaryEminem"Lose Yourself"4 weeks2 Marcht.A.T.u."All the Things She Said"3 weeks9 March16 March23 MarchChristina Aguilera"Beautiful"1 week30 MarchJennifer Lopez featuring LL Cool J"All I Have"1 week6 April50 Cent"In da Club"8 weeks13 AprilLinkin Park"Somewhere I Belong"1 week20 April50 Cent"In da Club"8 weeks27 April4 May11 May18 MayDelta Goodrem"Born to Try"1 week25 May50 Cent"In da Club"8 weeks1 June8 June15 JuneAmanda Perez"Angel"2 weeks22 June29 JuneClay Aiken"Bridge over Troubled Water"/"This Is the Night"1 week6 JulyR. Kelly"Ignition (Remix)"5 weeks13 July20 July27 July3 August10 AugustThe Black Eyed Peas featuring Justin Timberlake"Where Is the Love?"3 weeks17 AugustScribe"Stand Up"/"Not Many"12 weeks24 AugustThe Black Eyed Peas featuring Justin Timberlake"Where Is the Love?"3 weeks31 AugustScribe"Stand Up"/"Not Many"12 weeks7 September14 SeptemberThe Black Eyed Peas featuring Justin Timberlake"Where Is the Love?"3 weeks21 SeptemberScribe"Stand Up"/"Not Many"12 weeks28 September5 OctoberChingy"Right Thurr"1 week12 OctoberScribe"Stand Up"/"Not Many"12 weeks19 October3 the Hard Way"It's On (Move to This)"1 week26 OctoberScribe"Stand Up"/"Not Many"12 weeks2 November9 November16 November23 November30 November7 DecemberGuy Sebastian"Angels Brought Me Here"6 weeks14 December21 December28 December

2004

DateArtist SingleWeeks at number one4 JanuaryGuy Sebastian"Angels Brought Me Here"6 weeks11 January18 JanuaryThe Black Eyed Peas"Shut Up"1 week25 JanuaryBaby Bash featuring Frankie J"Suga Suga"3 weeks1 February8 February15 FebruaryJamelia"Superstar"3 weeks22 FebruaryScribe"Dreaming"/"So Nice"1 week29 FebruaryJamelia"Superstar"3 weeks7 March14 MarchEamon"Fuck It (I Don't Want You Back)"5 weeks21 March28 March4 April11 April18 AprilUsher featuring Lil Jon and Ludacris"Yeah!"3 weeks, 1 day19 AprilIn April 2004, the chart publication date shifted from Sunday to Monday. Therefore there was a one-day chart period for 18 – 19 April 2004.D12"My Band"1 week26 AprilUsher featuring Lil Jon and Ludacris"Yeah!"3 weeks, 1 day3 May10 May17 MayBen Lummis"They Can't Take That Away"7 weeks24 May31 May7 June14 June21 June28 June5 JulyUsher"Burn"3 weeks12 July19 July26 JulyMisfits of Science"Fools Love"4 weeks2 August9 August16 August23 AugustThe Rasmus"In the Shadows"1 week30 AugustAdeaze featuring Aaradhna"Getting Stronger"1 week6 SeptemberNelly"My Place"/"Flap Your Wings" 1 week13 SeptemberMichael Murphy"So Damn Beautiful"1 week20 SeptemberDei Hamo"We Gon' Ride"5 weeks27 September4 October11 October18 October25 OctoberP-Money featuring Scribe"Stop the Music"3 weeks1 November8 November15 NovemberEminem"Just Lose It"5 weeks22 November29 November6 December13 December20 DecemberBand Aid 20"Do They Know It's Christmas?"1 week27 DecemberSnoop Dogg featuring Pharrell"Drop It Like It's Hot"4 weeks

2005

DateArtist SingleWeeks at number one3 JanuarySnoop Dogg featuring Pharrell"Drop It Like It's Hot"4 weeks10 January17 January24 JanuarySavage"Swing"5 weeks31 January7 February14 February21 February28 FebruaryMario"Let Me Love You"5 weeks7 March14 March21 March28 March4 AprilSavage featuring Akon"Moonshine"7 weeks11 April18 April25 April2 May9 May16 May23 MayThe Black Eyed Peas"Don't Phunk with My Heart"3 weeks30 May6 June13 JuneAkon"Lonely"5 weeks20 June27 June4 July11 July18 JulyCrazy Frog"Axel F"11 weeks25 July1 August8 August15 August22 AugustThe Pussycat Dolls featuring Busta Rhymes"Don't Cha"1 week29 AugustCrazy Frog"Axel F"11 weeks5 September12 September19 September26 September3 October10 OctoberRihanna"Pon de Replay"1 week17 OctoberCrazy Frog"Popcorn"1 week24 OctoberRosita Vai"All I Ask"2 weeks31 October7 NovemberMattafix"Big City Life"1 week14 NovemberKanye West featuring Jamie Foxx"Gold Digger"2 weeks21 November28 NovemberThe Black Eyed Peas"My Humps"2 weeks5 DecemberCrazy Frog"Jingle Bells/Last Christmas"4 weeks12 December19 December26 December

2006