Timiș (Romanian pronunciation: [ˈtimiʃ]) is a county (județ) of western Romania on the border with Hungary and Serbia, in the historical region Banat, with the county seat at Timișoara. It is the westernmost and the largest county in Romania in terms of land area. The county is also part of the Danube–Criș–Mureș–Tisa Euroregion.

The name of the county comes from the river Timiș, known in Roman antiquity as river Tibisis or Tibiscus.

In Hungarian, it is known as Temes megye, German as Kreis Temesch, in Serbian as Тамиш / Tamiš, in Ukrainian as Ті́міш, and in Banat Bulgarian as Timiš.

In 2000, it had a population of 684,506 and the population density was 79/km².

In 2011, it had a population of 683,540 and the population density was 78/km².

This county has a total area of 8,697 km² (3,6% of Romania). It is the largest county in Romania.

In the eastern extremity are the Poiana Ruscă Mountains from the Western Romanian Carpathians group. Elevations decrease to the west, passing through the Lipova Hills to the Western Romanian Plain, the eastern part of the Pannonian Plain.