Nové Zámky (pronunciation; Hungarian: Érsekújvár, German: Neuhäusel, Turkish: Uyvar, Latin: Novum Castrum) is a town in Nové Zámky District in the Nitra Region of southwestern Slovakia.

The town is located on the Danubian Lowland, on the Nitra River, at an altitude of 119 metres. It is located around 100 km from Bratislava and around 25 km from the Hungarian border. It is a road and railway hub of southern Slovakia.

The town lies in the temperate zone and has a continental climate. Annual average temperature reaches around 10 °C (50.0 °F), with the warmest month being July with an average of 20 °C (68 °F) and the coldest January with −2 °C (28 °F). Average annual precipitation is 556 mm.

The town has a distinguished history. From the second half of the 10th century until 1918, it was part of the Kingdom of Hungary. A fortress was built as a defence against the Ottoman Empire, on the site of an older settlement in the years 1573–81. Between 1589 and 1663, the settlement was the seat of the Captaincy of Lower Hungary. The town developed around the fortress. The huge new fortress was one of the most modern in Europe when it was built, a prime example of the star fortress which was considered to be adapted to the advance in artillery in the preceding centuries. (In fact, the Hungarian name means "the archbishop's new castle".)

The Ottomans failed to conquer it six times (except Ottoman rule between 1566–1595 and 1605–1606), but in 1663 they managed to do so. It was made the center of an Ottoman eyalet in present-day southern Slovakia – with the subordinate sanjaks of Litra, Leve, Novigrad, Holok, Bukabak and Şefradi (probably Šahy).

The saying "Strong as an Ottoman in front of Nové Zámky", which means working with determination and stability, reflects the memory of conquest determination of the Ottomans.

In 1685 it was conquered by the imperial troops of Charles V, Duke of Lorraine. Six years later, it received town privileges from the Esztergom archbishop.

The town also played an important role in many anti-Habsburg uprisings in the northern parts of Royal Hungary in the 17th century. Emperor Charles VI had it razed in 1724–1725, to prevent potential further insurrections which would use the fortress as their base.

After the break-up of Austria-Hungary in 1918/1920, the town became part of the newly created Czechoslovakia. As a result of the First Vienna Award, it was occupied by Hungary between 1938 and 1945.

After the Germans occupied Hungary in March 1944, the deportation of Hungarian Jewry to Auschwitz began. The town’s Jews were concentrated in a temporary ghetto. On June 12 and 15, 1944, two transports of Jews were sent to the Auschwitz concentration camp. The entire local Jewry was deported; few survived.

During World War II (1944), the town was heavily damaged by bombings of the Allies. Only small parts of the fortress are still standing today. It is, however, still depicted on the city's coat of arms.

The Ernest Zmeták Art Gallery on Björnsonova Street has two permanent exhibitions. The first one, called "European Art of the 16th to 20th Century″, is based on the donation of a local painter and collector, Ernest Zmeták. The second one presents the works of art of a local Hungarian avant-garde artist and writer, Lajos Kassák.

The orthodox synagogue is located at Česká bašta and dates from 1880. After reconstruction in 1992 it was registered as a historic landmark of Slovakia. It is one of only four synagogues in Slovakia (in Bratislava, Košice, Bardejov and Nové Zámky) that are used for religious purposes by the local Jewish community.

see Franciscan church and monastery, Nové Zámky

The Franciscan church and monastery was built in the early baroque style in the middle of the 17th century. The complex was renovated in the 18th and at the end of the 19th century.

Historical population

Year	Pop.	±%
1970	24,962	—
1980	34,147	+36.8%
1991	42,923	+25.7%
2001	42,262	−1.5%
2011	39,646	−6.2%
2021	37,791	−4.7%
Source: Censuses

The 2001 census recorded a population of 42,262 people, with 69.67% of them being Slovaks, 27.52% Hungarians and others. The most widespread religion was Roman Catholicism (71.72%), followed by a group without denomination (17.75%) and Evangelics (Lutherans) (3.36%).

Year	Population	Year	Population
1694	1,200	1880	10,584
1713	1,525	1890	11,299
1731	2,970	1900	13,204
1755	3,873	1910	16,228
1779	4,671	1940	23,306
1787	5,167	1945	13,400
1811	5,493	1946	18,710
1821	5,957	1950	20,031
1830	6,904	1961	22,041
1851	6,936	1965	23,457
1857	7,622	1991	42,923
1869	9,483	2001	42,262

Ethnic comparison by year

	1700	1720	1890	1910	1930	1938	1991	2001	2011
Hungarian	61%	46%	71%	91.43%	45%	88%	31.10%	27.50%
Slovak	25%	36%	8%	5.94%	42%	9.5%	66.82%	69.70%
German	13%	17%	4%	2%	-	-	-	<0.1%
Romani	-	-	3%	-	-	-	-	0.60%
Jewish	-	-	13%	8.48%	8%	-	-	0.4%

• Lucien Aigner – photographer
• Etienne Aigner – fashion designer
• Anton Bernolák – linguist
• Ayrton Cable – social activist
• Ferenc Helbing – graphic artist
• Mary Katherine Horony – noted Old West figure, partner of Dr. John H. "Doc" Holliday, present at the Gunfight at the O.K. Corral in Tombstone, Arizona
• Lajos Kassák – writer, critic, poet, publisher
• Ernest Klein - linguist, author, and rabbi
• Ľudovít Klein - mixed martial artist
• Samuel Klein - rabbi, historian, and historical geographer in Mandatory Palestine.
• Henrieta Nagyová – tennis player
• Peter Ölvecký – professional ice hockey player
• Ladislav Pataki – sports scientist, athletics coach, masters athletics champion
• György Pray – Jesuit Abbot, canon, librarian, historian
• Miriam Roth – Israeli pioneer of preschool education, author and scholar of children's literature
• Martina Suchá – tennis player
• Yaakov Weiss - member of the Irgun in Mandatory Palestine

Nové Zámky is twinned with:

• Nové Zámky Roman Catholic Church
• Stadium in Nové Zámky

• Official website
• Map of Nové Zámky
• Nové Zámky Fotoalbum