PLOCK (Pol. Płock; Rus. Plotsk), city in Warszawa province, central Poland. As Jews settled there before 1237, when the city was the capital of Masovia, the Plock Jewish community is one of the oldest in Poland. In the first 200 years of their residence there, the Jews usually engaged in moneylending, sometimes accepting landed estates and other immovable property as security. Before the 16th century, however, they began to earn their living from trade and crafts. At the beginning of that century legal and municipal documents record the names of 28 Plock Jews who traded in wool, leather, spices, horses, and grain. About the middle of the century the burghers made a stubborn attempt to limit Jewish trade, but in 1555 King Sigismund II Augustus granted the Jews economic rights equal to those of the other citizens, and in 1576 King Stephen Báthory forbade the city authorities to hinder the Jews in their business pursuits. However, at the beginning of the 17th century the burghers succeeded in limiting the activities of the Jewish traders and artisans for some time. From the middle of the 17th century many Plock Jews engaged in weaving, glasswork, arms manufacture, and tailoring and some were accepted in the local Christian guilds, but the struggle of the Christian bakers, butchers, and harness makers against Jewish artisans continued. In the 16th century there were six Jewish physicians in Plock.
The Jewish quarter was first mentioned in 1532; in 1616 there were 25 houses in the town owned by Jews in which probably around 400 members of the Jewish community lived. The synagogue was opened in 1534, and a cemetery was consecrated in a suburb in 1570. In 1577 the parnasim of Plock – the physician Lewek and "Black Jacob" – appeared as prosecutors in the trial of the men who had hastily passed sentence in the *Sochaczew blood libel. In riots against the Jews in 1534, 1570, 1579, 1590, and 1656, the men of the Plock Jewish community took up arms in self-defense. After the depredations of the Great Northern War in 1705, the community suffered further economic loss through the hostile attitude of the nobility and the Church. In 1754 their situation deteriorated even further when a *blood libel caused an uproar in the city. About the middle of the 18th century the Jewish tailors organized their own guild in order to protect their livelihood (see E. Ringelblum, in: Miesiecznik żydowski, 2 no. 2 (1932), 46–47). The spiritual leaders of Plock Jewry in the 17th century included R. Ẓevi Hirsch Munk (in the 1680s), R. Menahem Nahum b. Israel (d. 1691), and Zelig Isaac Margolioth, author of Kesef Nivḥar (Amsterdam, 1712). Rabbis in the 18th
In the first years of the 19th century, under Prussian rule, the Jewish population of Plock grew from 731 in 1800 to 1,932 in 1808 (49% of the total population). As a result of the great fire in 1810, the synagogue and a considerable part of the Jewish quarter were destroyed. A year later the government of the grand duchy of Warsaw confined the Jews to a separate quarter which contained only eight streets, a restriction which remained in force until 1862.
In the middle of the 19th century the Jews of Plock earned their living from trade and transportation and Jewish entrepreneurs established textile factories in the city. In 1827 there were 3,412 Jews in Plock (35% of the population). In 1841–44, on the initiative of the industrialist Solomon Zalman *Posner, farming villages (Kuchary, Ickowiec) were founded near Plock in which 170 Jewish families had settled by 1850. In 1897 the Jewish population of the city numbered 1,480 (33% of the total). At the beginning of the 20th century about 5% of the Jews of Plock were engaged in commerce, 31% in crafts and industry (clothing, food, metals, printing), and about 12% earned their living as hired laborers. From 1865 to 1871 the town contained a government school where Jewish children were taught in Hebrew and Russian, and in 1888, on the initiative of the writer Abraham Jacob *Paperna, a Jewish school sponsored by the government was founded. In the talmud torah, founded in 1868, secular studies were introduced at the end of the 1880s on the initiative of the noted educator Aharon *Kahnstam. In 1872 the first Jewish hospital was built.
At the beginning of the 20th century, branches of the *Bund, the Zionist Socialists, and *Po'alei Zion began to operate in Plock. A yeshivah was opened in 1912 under the direction of Michael Rubinstein and Mendel Mendelson; in 1916 a Jewish high school was founded. In 1921, 7,352 Jews (29% of the total population) lived in Plock. In the period between the two world wars there were three Jewish cooperative banks and Jewish trade unions for the garment industry, transport workers, clerks, and salesmen. In the 1930s a *Tarbut school was founded and in 1938 an *ORT school. During this period the monthly Dos Plotsker Vort was published. The authors Jakir *Warszawski and Sholem *Asch, the painters Nathan Korzeń, Fishl Zilberberg (1909–1942), and Jehiel Meir (Max) Eljowicz, and the miniaturist David Tysziński lived in the city, as did the Zionist leaders Nahum Sokolow and Yiẓḥak Gruenbaum.
A. Nowowiejski, Płock (1931); Y. Trunk, Geshikhte fun Yidn in Plotsk (1939); S. Grinshpon, Yidn in Plotsk (1960); A. Eisenberg (ed.), Plock, Toledot Kehillah Attikat Yamim be-Polin (1967); S. Dubnow, in: Voskhod, no. 9 (1894), 119–24; R. Rybarski, Handel i polityka handlowa Polski w XVI stuleciu, 2 (1928), 141–3, 151–9; Z. Rubashov (Shazar), in: YIVO Historishe Shriftn, 1 (1929), 153–4; B. Wasiutyński, Ludność żydowska w Polsce w wiekach XIX i XX (1930), 7, 10, 18, 22, 41, 45–46, 70, 176, 180, 184, 209; S.B. Weinryb, Neueste Wirtschaftsgeschichte der Juden in Russland und Polen (1934), 42, 44–45; I. Schiper, Dzieje handlu żydowskiego na ziemiach polskich (1937), index; Halpern, Pinkas, index; Warsaw, Archiwum Glówne Akt Dawnych, Komisja rządowa spraw wewnętrznych i duchownych, no. 4584 (= CAHJP, ḤM 3598); Lodz, WAP, Rząd gubernski, wydzial administratywny, no. 8206 (= CAHJP, ḤM 6351); BŻIH, no. 52 (1964), 71–77.