It is located on the Promnik river, which is a tributary of the Vistula, near the Garwolin Forests, on the border of historic Polish provinces of Lesser Poland and Mazovia.

Currently Łaskarzew lies on both sides of the river, and the district on the left, Lesser Polish bank, is still called Gorczycew.

[1] It was stripped of its town rights by Russian authorities in 1870 as punishment after the unsuccessful January Uprising, and remained a village until the 1920s, when it already belonged to the Second Polish Republic.

On September 17, 1939, invading German forces murdered 58 people in the town, including 34 Jews and 24 Poles (see Nazi crimes against the Polish nation).

Among points of interest there are the Holy Cross Church (1884), destroyed during World War II, and rebuilt in 1946, and a cemetery chapel from 1847.