Iernut (, ) is a town in MureàCounty, central Transylvania, Romania. It administers eight villages: CipÃÂu (Maroscsapó), Deag (Marosdég), LechinÃÂa (Maroslekence), Oarba de Mureà(Marosorbó), Porumbac (Porumbáktanya), Racameà(Józseftanya), SÃÂlcud (Szélkút), and Sfântu Gheorghe (Csapószentgyörgy). It officially became a town in 1989, as a result of the Romanian rural systematization program.
The town is situated on the Transylvanian Plateau. It lies on the banks of the MureÃÂ River; the LechinÃÂa and Valea din Jos rivers discharge into the MureÃÂ here.
Iernut is located in the southwestern part of MureàCounty, north of TârnÃÂveni and west of the county seat, Târgu MureÃÂ. It lies at the intersection of two national roads: , which runs from Turda in Cluj County to Târgu Mureàand on to BacÃÂu in Western Moldavia, and , which connects Iernut to TârnÃÂveni and ends in MediaÃÂ, Sibiu County. The partially built A3 motorway (Autostrada Transilvania), which connects Bucharest to the Hungarian border near Oradea, runs just south of the town.
Artifacts from the Wietenberg culture (a Middle Bronze Age archeological culture that roughly dates to 2200âÂÂ1600/1500 BC) have been discovered in LechinÃÂa. After 1570, the town became part of the Principality of Transylvania. The Treaty of Radnot was signed here on 6 December 1656, during the Second Northern War; the treaty divided the PolishâÂÂLithuanian Commonwealth between the signing parties. Frequent invasions forced Michael I Apafi, Prince of Transylvania, to convoke the Transylvanian Diet to the fortress of Radnót in the late 1680s. Starting in the Middle Ages, the settlement was part of Küküllà  County in the Kingdom of Hungary; in 1876, the county was split in two, and Radnót fell within Kis-Küküllà  County.
In the aftermath of World War I, the Union of Transylvania with Romania was declared in December 1918. At the start of the HungarianâÂÂRomanian War of 1918âÂÂ1919, the locality passed under Romanian administration; after the Treaty of Trianon of 1920, it became part of the Kingdom of Romania. Iernut became the seat of Plasa Iernut in Târnava-MicàCounty; the villages LechinÃÂa de Mureàand Oarba de Mureàfell within Plasa LuduÃÂ, in Turda County.
In World War II, from 16 September to 6 October 1944, fierce fighting between the Romanian Fourth Army (under the command of Soviet general Sergei Trofimenko) and the German 8th Army occurred at the for the nearby Sângerogiu Hill. Some 11,000 Romanian soldiers lost their lives in this battle.
After the advent of the Romanian People's Republic, Iernut became in 1950 part of the Turda raion of Cluj Region. Between 1952 and 1960, it fell within the Magyar Autonomous Region, and between 1960 and 1968, the MureÃÂ-Magyar Autonomous Region. In 1968, the region was abolished, and since then, the settlement has been part of MureÃÂ County.
At the 2021 census, Iernut had a population of 8,473, of which 67.76% were Romanians, 12.26% Roma, 7.87% Hungarians, and 12% others. At the 2011 census, the town had 8,373 inhabitants, of which 76.55% were Romanians, 13.36% Hungarians, 9.84% Roma, and 0.18% others.
Iernut is twinned with: