Mikuszowice (German: Nikelsdorf) is an informal dzielnica (district) of Bielsko-Biała, Silesian Voivodeship, Poland.

In 1457 Jan IV of Oświęcim agreed to sell the duchy to the Polish Crown, and in the accompanying document issued on 21 February the village was mentioned as Mykluschowicze.

[7] The territory of the Duchy of Oświęcim was eventually incorporated into Poland in 1564 and formed Silesian County of Kraków Voivodeship.

[10] In the middle of the 17th century Stanisław Warszycki, the owner of Mikuszowice Krakowskie occupied the Silesian counterpart of the village, which led to an intervention of the Habsburg army in 1655.

According to the censuses conducted in 1880, 1890, 1900 and 1910 the population of the municipality grew from 809 in 1880 to 1502 in 1910 with the majority being native German-speakers (at least 863 or 79.4% in 1890 and at most 1042 or 83.6% in 1900, 1230 or 82.9% in 1900) accompanied by Polish-speaking minority (at least 111 or 13.7% in 1880, at most 223 or 20.4% in 1890, 254 or 17.1% in 1910).

The municipality was annexed by Nazi Germany at the beginning of World War II, after it they were restored to Poland.