Osiek is one of the oldest towns in the region. According to legends, in 1020 King Bolesław Chrobry presented the village called Ossziek to the Benedictine Monastery at Święty Krzyż. In 1253 the name of the village was spelled Ossek. It belonged to Princes of Sandomierz, and had its own marketplace. In 1270, Osiek was the property of Prince Bolesław V the Chaste. Its residents took advantage of a favorable location, along a merchant route from Kraków, through Sandomierz and Lublin, to the Grand Duchy of Lithuania. Many Piast dynasty princes would stop here during their trips across the country. Osiek most likely was a fortified gord, and in the mid-14th century, King Casimir III the Great built (or strengthened) a local castle.
Osiek was burned in the Second Mongol invasion of Poland, but the village was quickly rebuilt. In 1430, King Władysław II Jagiełło granted it the Magdeburg rights, allowing the town to organize weekly markets on Wednesdays. Osiek was a royal town of the Kingdom of Poland, administratively located in the Chęciny County in the Sandomierz Voivodeship in the Lesser Poland Province.4 It prospered during the Polish Golden Age. In the second half of the 16th century, its population amounted to 1,000, with a number of guilds, such as bakers, butchers, blacksmiths, tailors, potmakers, and millers. Osiek had 100 houses, and a wooden parish church of St. Stanisław. The decline of the town was brought by the Swedish invasion of Poland (1655–1660). Like almost all Lesser Poland's towns, Osiek was ransacked and burned, and never recovered from the destruction.
Following the Third Partition of Poland, in 1795, it was annexed by Austria. After the Polish victory in the Austro-Polish War of 1809, it was regained by Poles and included within the short-lived Duchy of Warsaw. After its dissolution, since 1815, it was part of the Russian-controlled Congress Poland. The town further declined in the 19th century, losing its charter in 1869, after January Uprising.
During the Invasion of Poland (September 1939), retreating units of the Polish Army fought here a battle with the Wehrmacht, in which app. 100 Poles died. As a result of World War I and World War II destruction, there are no other historic buildings in Osiek, except for the parish church.
On 1 July 1994 Osiek regained its town rights.
According to the 2011 Polish census, there were 2,001 people residing in Osiek, of whom 50% were male and 50% were female. In the town, the population consisted of 21.2% inhabitants under the age of 18; 38.6% between the age of 18 and 44; 23.6% from 45 to 64; and 16.6% residents who were 65 years of age or older.5
In the years 1970 of last age, sorted and prepared out list part of names of localities for Osiek, at as type of settlement then yet is a village, what you can see in table 3. Remaining not exchanged parts here are described in integral part of town Osiek now, in Osieczko.
Table 3. Index of official names of localities and physiographic objects9Names of village – townNames of part of village – townNames of physiographic objects – nature of objectsI. Gromada OSIEKOsiekDwórGaj OsieckiGrabowiecParysówkaBroźnia – forestBuchnia – fieldChudyniówka (Chudzyniówka) – fieldDołki – fieldGaj Osiecki – fieldGrabowiec – field, forestKacapówka – field, forestKozłówka – meadowŁugi – fieldNakielec – fieldNiwa – fieldParysówka – fieldPasierbowskie – fieldPastwisko – meadowPod Cmentarzem – fieldPod Kierkutem – fieldPod Wolą – fieldPodgórki – fieldPosusze – fieldRzeka – brookSkotnia – fieldStawiska – meadowZagrądzie – fieldZagroble – meadow, fieldZagumnie – field
Bielec, Jan (ed.); Szwałek, Stanisława (1981). Wykaz urzędowych nazw miejscowości w Polsce. T. II: K – P [List of official names of localities in Poland, Vol. II: K – P] (in Polish). Ministry of Administration, Spatial Economy and Environmental Protection (1st ed.). Warsaw, Poland: Central Statistical Office. {{cite book}}: |first1= has generic name (help) /wiki/Central_Statistical_Office_(Poland) ↩
Sitek, Janusz (1991). Nazwy geograficzne Rzeczypospolitej Polskiej [Geographical names of the Republic of Poland] (in Polish). Ministry of Physical Planning and Construction, Surveyor General of Poland, Council of Ministers' Office, Commission for Establishing Names of Localities and Physiographical Objects (1st ed.). Warsaw, Poland: Eugeniusz Romer State Cartographical Publishing House. ISBN 83-7000-071-1. 83-7000-071-1 ↩
"Osiek, miasto, gmina Osiek – miasto, powiat staszowski, województwo świętokrzyskie" [Osiek, town, Osiek Commune – urban area, Staszów County, Świętokrzyskie Province, Poland]. Topographical map prepared in 1:10,000 scale. Aerial and satellite orthophotomap (in Polish). Head Office of Geodesy and Cartography, Poland, Warsaw. 2011. geoportal.gov.pl. Archived from the original on 21 December 2012. Retrieved 27 April 2011. https://archive.today/20121221183757/http://maps.geoportal.gov.pl/webclient/default.aspx?crs=EPSG:2180&bbox=672926.7172194903,297544.93361074984,673292.8952982252,297693.4552291886&variant=ORTO ↩
Województwo sandomierskie w drugiej połowie XVI wieku; Cz.1, Mapy, plany (in Polish). Warszawa: Wydawnictwo Naukowe PWN. 1993. p. 3. /wiki/Polish_Scientific_Publishers_PWN ↩
"Local Data Bank (Bank Danych Lokalnych) – Layout by NTS nomenclature (Układ wg klasyfikacji NTS)". demografia.stat.gov.pl: GUS. 10 March 2011. http://www.stat.gov.pl/bdlen/app/strona.html?p_name=indeks ↩
Cf. Kaczmarek, Leon (ed.); Taszycki, Witold (1970). Urzędowe nazwy miejscowości i obiektów fizjograficznych. 33. Powiat staszowski województwo kieleckie [Official Names of Localities and Physiographic Objects. 33. Staszów County Kielce Voivodeship] (in Polish). Commission for Establishing Names of Localities and Physiographic Objects (to business use). Vol. 33. Warsaw, Poland: Council of Ministers' Office. Cabinet Office for bureaux of the Supervisory Boards. pp. 30, 77–82, 84–91, 95. {{cite book}}: |first1= has generic name (help) /wiki/Template:Cite_book ↩