| Županja | |
| Official Name: | Grad Županja Town of Županja |
| Settlement Type: | Town |
| Flag Size: | 75px |
| Pushpin Map: | Croatia Vukovar-Srijem County#Croatia#Europe |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location of Županja in Croatia |
| Pushpin Label Position: | left |
| Coordinates: | 45.07°N 18.7°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Croatia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Posavina |
| Subdivision Type2: | County |
| Established Title1: | Municipality |
| Government Footnotes: | [1] [2] [3] |
| Government Type: | Mayor-council |
| Leader Party: | Ind. |
| Leader Title: | Mayor |
| Leader Name: | Damir Juzbašić |
| Leader Title2: | City council |
| Area Footnotes: | [4] |
| Area Total Km2: | 50.2 |
| Area Urban Km2: | 50.2 |
| Population As Of: | 2021 |
| Population Total: | 9153 |
| Population Density Km2: | auto |
| Population Urban: | 9153 |
| Population Density Urban Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal codes |
| Postal Code: | HR-32 270[5] |
| Area Code Type: | Area code |
| Area Code: | +385 32[6] |
| Blank Name: | License plates |
| Blank Info: | ŽU |
Županja (in Croatian pronounced as /ʒǔpaɲa/, Hungarian: Zsupanya, German: Schaupanie) is a town in eastern Slavonia, Croatia, located 254 km east of Zagreb. It is administratively part of the Vukovar-Syrmia County. It is inhabited by 12,090 people (2011).
Županja lies on the Sava river opposite Bosnia and Herzegovina, and is the site of a border-crossing bridge with the town of Orašje in Bosnia and Herzegovina. The A3 highway Zagreb-Slavonski Brod-Belgrade passes north of it, and the city is also reachable by a local railroad from Vinkovci as well as the state road D55. The 2011 census recorded 96.72% Croats in the municipality.
Županja was ruled by Ottoman Empire between 1536 and 1687 as part of Sanjak of Syrmia. Since the Treaty of Karlowitz in 1699, until 1918, Županja (named ZUPANJE when a post-office was opened in 1861)[7] remained in the Austrian monarchy (Kingdom of Croatia-Slavonia after the compromise of 1867), in the Slavonian Military Frontier, under the administration of the Brooder Grenz-Infanterie-Regiment N°VII until 1881. In the late 19th and early 20th century, Županja was a district capital in the Kingdom Syrmia County. From 1929 to 1939, Županja was part of the Sava Banovina and from 1939 to 1941 of the Banovina of Croatia within the Kingdom of Yugoslavia.
NK Graničar is the major football club who play in the third tier of the Croatian football pyramid.