Yazlovets (Ukrainian: Язловець, romanized: Yazlovets; Polish: Jazłowiec) is a village in Chortkiv Raion, Ternopil Oblast, Ukraine. It is a Catholic pilgrimage centre of local significance. The village belongs to the Buchach urban hromada. It lies on the Vilchivchik river, a tributary of the Strypa and is located 16 km south of Buchach and presently has around 600 inhabitants. From 1947-91, it was known as Yablunivka. Apart from the ruined fortifications, there is little sign now that in the 15th and 16th centuries this was a thriving trading centre, on major international mercantile routes between the Black Sea and Northern Europe, and host to multiple merchant families of diverse ethnicities and religions. It was an instance of a privately owned settlement, such as was Zamość in Poland. The city's square has been entirely obliterated.

From 1340 until the first partition of Poland (1772), Jazłowiec belonged to the Kingdom of Poland, as part of Red Ruthenia and was later absorbed within the Polish–Lithuanian Commonwealth, before it was annexed by the Austrian Empire and returning to Poland in 1918 until the 1939 simultaneous invasion and partition of Poland by Soviet and Nazi German rule. In 1946 it was part of the Soviet Union and since 1991 it has been in Ukraine.

The earliest written record of Jazłowiec, or Yazlovets, dates from the 15th century, as the property of the Jazłowiecki szlachta family, a branch of the Buczacki family from the neighbouring town of Buczacz. In 1406 king Władysław II Jagiełło presented Jazłowiec to starosta Dziersław Konopka, who under pressure from the Grand Duchy of Lithuania, in the person of Grand Duke Vytautas the Great, ceded the domain to Teodoric Buczacki Jazłowiecki. According to other sources, Jazłowiec passed in 1417 into the possession of the Buczacki family. The owners of Yazlovets are noted in history for their contribution to the defence of Christendom against Turkish invasions. The fortress whose extensive remnants dominate the village, was erected in the 16th century by the Protestant Jerzy Jazłowiecki, later extended by his Catholic son, Mikołaj Jazłowiecki. From at least the 17th century, Jazłowiec had its own Jewish community which lasted until The Holocaust.

During the 16th century, a stone church dedicated to the Assumption of the Blessed Virgin Mary and a monastery of the Dominican Order were built. In 1615 the Jazlowiecki family issued privileges encouraging Armenian refugees from Crimea to settle in the town, as happened in Kamieniec Podolski (now Kamianets-Podilskyi), since the community brought in increased trade and hence income to the locality. Next to the city of Lwów, Jazłowiec became temporarily the second bishopric of the Armenian community in Poland. By 1708 Jazłowiec was the centre of several different religious vicariates. There were: the Catholic church of the Nativity, the Armenian church of Saint Nicholas and the Orthodox church of Saint Elias.

1644-1659 saw the extension of the fortress by Hetman Stanisław Koniecpolski and his son, Aleksander, to whom the Sejm of 1658 granted the right of collecting customs charges for maintaining an armed garrison.

The town's prosperity lasted until 1672, when it was captured and occupied by the Ottomans for ten years, (see Polish–Ottoman War (1672–76)). It was nominally ruled by Ottomans between 1684-1699 and contested by Poles and Turks during this period. Administratively, it became a Sanjak known as "Yazlofça" in the Podolia Eyalet of the Ottoman Empire, under the nahiyahs of Yazlofça, Çortkuv and Kaşperofça. Jazłowiec returned to Poland after the Treaty of Karlowitz in 1699.

In 1718, the Pauline Fathers were invited to the town. In 1746 the town was acquired by Stanisław Poniatowski who built the extant palace on the lower ramparts of the fortress and probably used them as building material for his elegant project. For the next thirty years it was the seat of the Poniatowski family and was the place where the future and last elected monarch of the Republic of Two Nations, Stanisław August Poniatowski, spent part of his childhood. In 1766, as the then king and owner of the town, Stanisław August Poniatowski confirmed the town's rights as had been conferred earlier by his father and older brother. In 1772, the town was politically "detached" from Poland, and occupied under Austrian rule, the policies of Emperor Joseph II led to the closure of both monasteries. In 1810, the ruined Armenian church was restored and given to the town's Ukrainian community and consecrated to Saint Nicholas. The palace and its estate changed hands several times in the early part of the 19th century.

The nearby fortified town of Buczacz, 13 kilometres to the north of Jazłowiec, was an important centre of Jewish life and scholarship for four centuries or more, since 1572. Jazłowiec's own community dates its Jewish cemetery to the 18th century. Under Galicia, in 1880, the population of the town's Jews had risen to 1,642. After the conflicts and border changes of the early 20th century, it had fallen in 1921 to 474. In 1941 the Germans invaded the Soviet partition of Poland. A ghetto had been established in Buczacz in 1942. In November of that year, about 8,000 Jews from surrounding townships, including those from Jazłowiec, were rounded up and settled in Buccacz. On February 2, 1943, 2,000 Jews from there were executed, 500 more were killed on June 11 with one thousand exterminated on June 26 of that year. In March 1944, after the German troops had left, 800 Jews remained in the area. However, the German army later returned and murdered most of those who had emerged from their hideouts.