|Tourism region||Horné Považie|
|Elevation||308 m (1,010 ft)|
|Area||43.168 km2 (16.667 sq mi)|
|Population||11,595 (31 December 2006)|
|Density||269/km2 (697/sq mi)|
|- summer (DST)||CEST (UTC+2)|
|Postal code||014 01|
|Wikimedia Commons: Bytča|
The town arose in 1946 by a merger of the settlements Malá Bytča (including Beňov and Mikšová), Veľká Bytča and Hliník nad Váhom. The first written reference to the town's main part Veľká Bytča dates from 1234 as terra Bycha. The settlement got its town charter in 1378. It was the seat of a feudal dominion and later a town with many craftsmen. In Hungarian, it was known as Biccse.
The town features a famous castle the Thurzó Castle built as a water castle by Pongrác Szentmiklósi in the 13th century and rebuilt in the 16th century in Renaissance style by Ferenc Thurzó. The town also houses the Wedding Palace (built by György Thurzó for his daughters' wedding) from 1601, which is the only building of this kind in Slovakia, Renaissance, Baroque and Classical bourgeoisie houses, an archive, and a museum (in the Wedding Palace).
According to the 2001 census, the town had 11,150 inhabitants. 98.27% of inhabitants were Slovaks and 0.58% Czechs. The religious make-up was 90.87% Roman Catholics, 4.35% people with no religious affiliation and 1.51% Lutherans.
Today, the town is home to machine (Kinex), textile, wood processing (sports equipment), and food (brewery) industries.
Bytča includes the following former villages: Psurnovice, Hrabove, Horne Hlboke, Dolne Hlboke, Hlboke nad Vahom, Benov, Miksova, Hlinik nad Vahom, Velka Bytca, Mala Bytca. 
Current boroughs (year of merger in brackets):
- Beňov (c. 1899 with Malá Bytča, probably Hungarian name was Banya)
- Hliník nad Váhom (1946, Hungarian: Hlinik; also called Vágagyagos between 1899 and 1919)
- Hrabové (1971; Hungarian: Hrabova; also called Rabó between 1899 and 1919)
- Malá Bytča (1946; Hungarian: Kisbiccse, German: Klein-Bitsch; also called Miksofalva from 1907 to 1919)
- Mikšová (1907 with Malá Bytča, Hungarian: Miksófalvá)
- Pšurnovice (1971; Hungarian: Psurnovicz; also called Legelővölgy between 1899 and 1919)
- Veľká Bytča (1946; Hungarian: Nagybiccse, German: Groß-Bitsch)
Twin towns — Sister cities
Bytča is twinned with:
The records for genealogical research are available at the state archive "Statny Archiv in Bytca, Slovakia"
- Roman Catholic church records (births/marriages/deaths): 1630-1900 (parish A)