Trzcianka-Kolonia[3][4] [ˈtʂt͡ɕaŋka kɔˈlɔɲa] (till December 31, 2001 as at Kolonia Trzcianka[3][4]) is a colony in the administrative district of Gmina Osiek, within Staszów County, Świętokrzyskie Voivodeship, in south-central Poland.

[5] It lies approximately 6 kilometres (4 mi) south-west of Osiek, 20 km (12 mi) south-east of Staszów, and 72 km (45 mi) south-east of the regional capital Kielce.

The village has a population of 89.

According to the 2002 Poland census, there were 100 people residing in Trzcianka-Kolonia village, of whom 48% were male and 52% were female.

In the village, the population was spread out, with 28% under the age of 18, 34% from 18 to 44, 22% from 45 to 64, and 16% who were 65 years of age or older.