| Competition: | 1. Lig |
| Season: | 2009–10 |
| Winners: | Karabük |
| Promoted: | Karabük, Buca |
| Relegated: | Hacettepe, Ç. Dardanel, Kocaeli |
| League Topscorer: | Yasin Avcı (18) |
| Biggest Home Win: | Buca 6–1 Rize |
| Biggest Away Win: | Mersin 1–6 Karabük |
| Highest Scoring: | Adana 3–4 Rize Giresun 3–4 Altay Bolu 5–2 Kartal Hacettepe 2–5 GBB |
| Matches: | 306 |
| Total Goals: | 780 |
| Prevseason: | 2008–09 |
| Nextseason: | 2010–11 |
The 2009–10 TFF 1. Lig (also known as Bank Asya 1. Lig due to sponsoring reasons) is the 47th season of the second-level football league of Turkey since its establishment in 1963–64.
2008–09 TFF First League champions Manisaspor, runners-up Diyarbakırspor and play-off winners Kasımpaşa were promoted to the 2009–10 Süper Lig. They were replaced by Konyaspor, Kocaelispor and Hacettepe, who ended the 2008–09 season in the bottom three places of the standings.
Sakaryaspor, Güngören Belediyespor and Malatyaspor were relegated to the Second League after finishing in the last three spots of the 2008–09 First League season standings. They were replaced by Second League teams Bucaspor, Mersin İdmanyurdu and Çanakkale Dardanelspor.
| Team | Venue | Capacity[1] | Kitmaker | President | Coach | |
|---|---|---|---|---|---|---|
| Adanaspor | Adana 5 Ocak Stadium | 22,000 | Nike | Bayram Akgül |  Kemal Kılıç | |
| Altay | İzmir Alsancak Stadium | 15,055 | Lescon | Niyazi Konuşmaz | Güvenç Kurtar | |
| Boluspor | Bolu Atatürk Stadium | 8,000 | Adidas | Recep Aydoğanlı | Cüneyt Karakuş | |
| Bucaspor | Buca Arena | 12,000 | Lescon | Mehmet Bektur | Özcan Kızıltan | |
| Çanakkale Dardanelspor | Çanakkale 18 Mart Stadium | 12,692 | Diadora | Niyazi Önen | Mustafa Meteertem | |
| Çaykur Rizespor | Yeni Rize Şehir Stadı | 10,459 | Lotto | Halim Mete | Ümit Kayıhan | |
| Gaziantep BŞB | GASKİ Stadium | 5,000 | Lotto | Ünsal Göksen | C. Gürsel Menteşe | |
| Giresunspor | Giresun Atatürk Stadium | 12,192 | Lescon | Olgun Aydın Peker | Levent Eriş | |
| Hacettepe | Ankara 19 Mayıs Stadium | 19,209 | Lotto | Turgay Kalemci | Erol Tok | |
| Kardemir Karabükspor | Necmettin Şeyhoğlu Stadium | 9,086 | Kappa | Hikmet Feridun Tankut | Yücel İldiz | |
| Karşıyaka | İzmir Atatürk Stadium | 58,008 | Lotto | Akif Ersezgin | Erdoğan Arıca | |
| Kartalspor | Kartal Stadium | 15,000 | Diadora | Cumhur Tavsatmaz | Kadir Özcan | |
| Kayseri Erciyesspor | Kayseri Kadir Has Stadium | 32,864 | Errea | Nuh Mehmet Delikan | Levent Devrim | |
| Kocaelispor | İzmit İsmet Paşa Stadium | 16,800 | Nike | Muammer Çelik | vacant | |
| Konyaspor | Konya Atatürk Stadium | 22,459 | Lotto | Bahattin Karapınar | Ziya Doğan | |
| Mersin İdmanyurdu | Tevfik Sırrı Gür Stadium | 10,128 | Adidas | Ali Kahramanlı | Ergün Penbe | |
| Orduspor | Ordu 19 Eylül Stadium | 15,000 | Adidas | Nedim Türkmen | Ahmet Akcan | |
| Samsunspor | Samsun 19 Mayıs Stadium | 19,000 | Errea | Hakkı Tomaç | Hüseyin Kalpar |
| Team | Outgoing manager | Manner of departure | Date of vacancy | Replaced by | Date of appointment | |
|---|---|---|---|---|---|---|
| Giresunspor | Yüksel Yeşilova | Sacked | 7 Sep 2009[2] | Levent Eriş | 16 Sep 2009[3] | |
| Adanaspor | Ekrem Al | Resigned | 28 Sep 2009[4] | Kemal Kılıç | 5 Oct 2009[5] | |
| Bucaspor | Kemal Kılıç | Resigned | 30 Sep 2009[6] | Özcan Kızıltan | 5 Oct 2009[7] | |
| Orduspor | Osman Özdemir | Sacked | 12 Oct 2009[8] | Ekrem Al | 14 Oct 2009[9] | |
| Samsunspor | Turhan Özyazanlar | Resigned | 20 Oct 2009[10] | Hüseyin Kalpar | 30 Oct 2009[11] | |
| Boluspor | Coşkun Demirbakan | Mutual termination | 2 Nov 2009[12] | Mustafa Uğur | 8 Nov 2009[13] | |
| Gaziantep B.B. | Bünyamin Süral | Resigned | 2 Nov 2009[14] | Cemal Gürsel Menteşe | 4 Nov 2009[15] | |
| Karşıyaka | Reha Kapsal | Sacked | 6 Nov 2009[16] | Ümit Turmuş | 18 Nov 2009[17] | |
| Ç. Rizespor | Oktay Çevik | Mutual termination | 29 Nov 2009[18] | 3 Dec 2009[19] | ||
| K. Erciyespor | Mustafa Altındağ | Sacked | 4 Dec 2009 | Levent Devrim | 4 Dec 2009[20] | |
| Orduspor | Ekrem Al | Resigned | 21 Dec 2009[21] | Ahmet Akcan | 24 Dec 2009[22] | |
| Hacettepe | Zeki Önder Özen | Sacked | 24 Dec 2009[23] | Erol Tok | 31 Dec 2009[24] | |
| Mersin İY | Serhat Güller | Resigned | 31 Jan 2010[25] | Ergün Penbe | 5 Feb 2010[26] | |
| Kocaelispor | Cihat Arslan | Resigned | 1 Feb 2010[27] | Bülent Baturman | 3 Feb 2010[28] | |
| Ç. Rizespor | Resigned | 2 Feb 2010 | 2 Feb 2010[29] | |||
| Altay | Resigned | 8 Feb 2010[30] | 9 Feb 2010[31] | |||
| Konyaspor | Sacked | 8 Feb 2010[32] | Fuat Yaman | 16 Feb 2010[33] | ||
| Kocaelispor | Bülent Baturman | Sacked | 16 Feb 2010 | Coşkun Demirbakan | 16 Feb 2010[34] | |
| Karşıyaka | Ümit Turmuş | Sacked | 18 Feb 2010[35] | Nihat Umut | 18 Feb 2010[36] | |
| Konyaspor | Resigned | 22 Mar 2010[37] | Ziya Doğan | 26 Mar 2010[38] | ||
| Karşıyaka | Nihat Umut | Left | 24 Mar 2010[39] | Erdoğan Arıca | 25 Mar 2010[40] | |
| Boluspor | Mustafa Uğur | Resigned | 5 Apr 2010[41] | Cüneyt Karakuş | 6 Apr 2010[42] | |
| Kocaelispor | Coşkun Demirbakan | Mutual termination | 21 Apr 2010[43] | vacant | ||
| Altay | Sacked | 8 May 2010[44] | 9 May 2010[45] |
The teams ranked third through sixth have competed in the promotion playoffs for the 2010–11 Süper Lig. The games have been played at Atatürk Olympic Stadium and Ali Sami Yen Stadium in 17, 20 and 23 of May, 2010.[46]
Including matches played on 9 May 2010; Source: TFF
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 | Yasin Avcı | Kardemir Karabükspor | 18 |
| 2 |  Emmanuel Emenike | Kardemir Karabükspor | 16 |
| Mehmet Batdal | Bucaspor | 16 | |
| 4 |  Shaibu Yakubu | Kartalspor | 14 |
| Turgut Doğan Şahin | Samsunspor | 14 | |
| 6 | Okan Öztürk | Karşıyaka | 13 |
| 7 |  Fabiano Monteiro | Giresunspor | 12 |
| 8 | Adem Büyük | Boluspor | 11 |
| Ricardo Pedriel Suárez | Giresunspor | 11 | |
| Yunus Altun | Bucaspor | 11 |
Charles Mendy
Jamal Clarence
