Village. The seat of the commune office.

Former prince's village, initially known as Gylów, temporarily belonging to 1224-49 to the Cistercian monastery in Sulejów, then private property. From 1506 r. city. Development as an urban center is slow, probably due to the proximity of others, prosperous cities – Sochaczew and Gąbin. A certain economic recovery started only in 1760 r. after bringing German settlers here. Colonists in 1775 r. they founded the first Evangelical parish in this part of Mazovia, and Iłów became the main Evangelical center in these lands. From 1795 r. the city was included in the Prussian partition. In years 1807-15 in the Duchy of Warsaw. From 1815 do 1918 r. in the Kingdom of Poland. W 1846 r. Iłów goods were purchased from private hands by the Russian government and included in the so-called. of the Duchy of Łowicz. W 1869 r. there was a loss of city rights.

During World War I, Iłów was significantly damaged. After the outbreak of World War II, having below 50 years men – descendants of German colonizers – they were interned and directed to the eastern border of Poland. The column of internees near Garwolin was fired upon by German planes, and many of them died. Later, the German propaganda attributed this event to the deliberate actions of escorting the column to Poles. Nazis, to fuel hostile moods among the descendants of German colonizers towards Poles, they organized in 1940 r. at the local Evangelical cemetery, a solemn funeral of the men who died near Garwolin. After World War II, the Evangelicals from Iłów were displaced.

Urbanization assumption with extended, rectangular market. Parish Church. pw. Finding the Holy Cross, brick, built in 1781 r., destroyed during the First World War, rebuilt in 1921 wg proj. Henryk Kudera, burnt in 1948 r., rebuilt according to the design. Bruno Zborowski, having late baroque features. The front elevation is decorated with Tuscan pilasters and topped with an arched gable. Indoor with a separate, narrower, chancel closed on three sides. Inside, among others. a late-gothic sculpture of the Risen Christ from the turn of the 16th and 17th centuries. Next to the brick belfry with 1 half. XIX w. The church is surrounded by a brick fence 4 chapels, built in 1 half. XIX w.

A brick manor house probably from the 16th century., rebuilt in 1855 r. i w XX w., now a health center.

At the Roman Catholic cemetery there is a cemetery chapel built at the turn of the 18th and 19th centuries 1866 r. Wooden, carcass construction, boarded. On a rectangular plan, cut from the east. corners. There is a ridge on the ridge. One-space interior. The graves of approx. 650 Polish soldiers killed in September 1939 r., Mainly from 14 DP of the army "Poznań". Tombstones commemorating Polish soldiers who died in September 1939 r "soldiers 57 infantry regiment killed in September 1939 r. and soldiers and partisans who died in the fighting in the years 1939-45.

Evangelical cemetery, on which many cast-iron tombstones from the nineteenth and early. XX w.

Former house of the pastor of 2 half. XIX w., brick and plastered, single-story, standing next to the demolished village 1945 r. neo-gothic evangelical church