| District 3 | |
| Native Name: | 3. Bölge |
| Status: | Operational |
| Map State: | collapsed |
District 3 of the Turkish State Railways is one of TCDD's 7 districts. The district was formed in 1950, when TCDD split into its original 5 districts. District 3 has three main lines, all starting in İzmir. The İzmir-Bandırma Line, the İzmir-Uşak Line and the İzmir-Denizli Line. There are many branch lines along these lines. District 3 headquarters are located in Alsancak Terminal in İzmir. Major cities such as İzmir, Manisa, Balıkesir, Bandırma, Aydın and Uşak are served.