| Czech |
| has gloss | ces: Seznam singlů které obsadily první místo v Billboard Hot 100 | class="wikitable" !Období !Píseň !Umělec !Reference |- |3. ledna |style="text-align: center;" rowspan="2"|"Single Ladies (Put a Ring on It)" |style="text-align: center;" rowspan="2"|Beyoncé |style="text-align: center;"| |- |10. ledna |style="text-align: center;"| |- |17. ledna |style="text-align: center;" rowspan="3"|"Just Dance" |style="text-align: center;" rowspan="3"|Lady Gaga featuring Colby O'Donis |style="text-align: center;"| |- |24. ledna |style="text-align: center;"| |- |31. ledna |style="text-align: center;"| |- |7. února |style="text-align: center;" rowspan="2"|"My Life Would Suck Without You" |style="text-align: center;" rowspan="2"|Kelly Clarkson |style="text-align: center;"| |- |14. února |style="text-align: center;"| |- |21. |
| lexicalization | ces: Billboard Hot 100 |
| German |
| lexicalization | deu: Liste der Nummer-eins-Hits in den USA |
| Finnish |
| has gloss | fin: Tämä on luettelo Billboard Hot 100 -listan kärkipaikkaa hallussaan vuonna 2009 pitäneistä artisteista ja levyistä. |
| lexicalization | fin: Luettelo Billboard Hot 100 -listan ykkösistä 2009 |
| Hungarian |
| lexicalization | hun: A Billboard Hot 100 listájának első helyezett kislemezei 2009-ben |
| Italian |
| has gloss | ita: La Billboard Hot 100 è una classifica dei singoli più venduti negli Stati Uniti d'America redatta dal magazine Billboard e stilata sulla base dei dati di vendita calcolati non solo sugli album venduti "fisicamentee", ma anche sulle vendite digitali e sui passaggi in radio. Nel 2009 sono stati dodici i brani capaci di arrivare alla prima posizione di questa classifica, tredici se consideriamo anche la canzone Single Ladies (Put a Ring on It) di Beyoncé che si trovava in vetta alla classifica già alla fine del 2008. |
| lexicalization | ita: Lista dei singoli al numero uno nella Billboard Hot 100 nel 2009 |
| Dutch |
| has gloss | nld: | class="wikitable" width="100%" | width="100px" |Datum || Artiest || Titel |- | 3 januari || Beyoncé || Single ladies (Put a ring on it) |- | 10 januari || Beyoncé || Single ladies (Put a ring on it) |- | 17 januari || Lady Gaga & Colby ODonis || Just dance |- | 24 januari || Lady Gaga & Colby ODonis || Just dance |- | 31 januari || Lady Gaga & Colby ODonis || Just dance |- | 7 februari || Kelly Clarkson || My life would suck without you |- | 14 februari || Kelly Clarkson || My life would suck without you |- | 21 februari || Eminem, Dr. Dre & 50 Cent || Crack a bottle |- | 28 februari || Flo Rida & Ke$ha || Right round |- | 7 maart || Flo Rida & Kesha || Right round |- | 14 maart || Flo Rida & Kesha || Right round |- | 21 maart || Flo Rida & Kesha || Right round |- | 28 maart || Flo Rida & Kesha || Right round |- | 4 april || Flo Rida & Kesha || Right round |- | 11 april || Lady Gaga || Poker face |- | 18 april || Black Eyed Peas || Boom boom pow |- | 25 april || Black Eyed Peas || Boom boom pow |- | 2 mei || Black Eyed Peas || Boom boom pow |- | 9 mei || Black Eyed Peas || Boom boom pow |- | 16 mei || Black Eyed Peas || Boom boom pow |- | 23 mei || Black Eyed Peas || Boom boom... |
| lexicalization | nld: Nummer 1-hits in de Billboard Hot 100 in 2009 |
| Polish |
| lexicalization | pol: Single numer jeden w roku 2009 |
| Swedish |
| lexicalization | swe: Billboardlistans förstaplaceringar 2009 |
| Turkish |
| has gloss | tur: | width="100%" | Hafta || Şarkı || Sanatçı |- | 3 Ocak || "Single Ladies (Put a Ring on It)" || Beyoncé |- | 10 Ocak || "Single Ladies (Put a Ring on It)" || Beyoncé |- | 17 Ocak || "Just Dance" || Lady GaGa ve Colby ODonis |- | 24 Ocak || "Just Dance" || Lady GaGa ve Colby ODonis |- | 31 Ocak || "Just Dance" || Lady GaGa ve Colby O'Donis |- | 7 Şubat || "My Life Would Suck Without You" || Kelly Clarkson |- | 14 Şubat || "My Life Would Suck Without You" || Kelly Clarkson |- | 21 Şubat || "Crack a Bottle" || Eminem, Dr. Dre ve 50 Cent |- | 28 Şubat || "Right Round" || Flo Rida ve Kesha |- | 7 Mart || "Right Round" || Flo Rida ve Kesha |- | 14 Mart || "Right Round" || Flo Rida ve Kesha |- | 21 Mart || "Right Round" || Flo Rida ve Kesha |- | 28 Mart || "Right Round" || Flo Rida ve Kesha |- | 4 Nisan || "Right Round" || Flo Rida ve Kesha |- | 11 Nisan || "Poker Face" || Lady GaGa |- | 18 Nisan || "Boom Boom Pow" || The Black Eyed Peas |- | 25 Nisan || "Boom Boom Pow" || The Black Eyed Peas |- | 2 Mayıs || "Boom Boom Pow" || The Black Eyed Peas |- | 9 Mayıs || "Boom Boom Pow" || The Black Eyed Peas |- | 16 Mayıs || "Boom Boom Pow" || The Black Eyed Peas |- | 23 Mayıs || "Boom Boom Pow"... |
| lexicalization | tur: ABD 2009 yılı 1 numara şarkıları |
| Vietnamese |
| lexicalization | vie: Danh sách đĩa đơn quán quân Hot 100 năm 2009 |
