Chomutov District (Czech: okres Chomutov) is a district in the Ústí nad Labem Region of the Czech Republic. Its capital is the city of Chomutov.

Chomutov District is divided into two administrative districts of municipalities with extended competence: Chomutov and Kadaň.

Cities and towns are marked in bold and market towns in italics:

Bílence - Blatno - Boleboř - Březno - Černovice - Chbany - Chomutov - Domašín - Droužkovice - Hora Svatého Šebestiána - Hrušovany - Jirkov - Kadaň - Kalek - Klášterec nad Ohří - Kovářská - Křimov - Kryštofovy Hamry - Libědice - Loučná pod Klínovcem - Málkov - Mašťov - Měděnec - Místo - Nezabylice - Okounov - Otvice - Perštejn - Pesvice - Pětipsy - Račetice - Radonice - Rokle - Spořice - Strupčice - Údlice - Vejprty - Veliká Ves - Vilémov - Vrskmaň - Všehrdy - Všestudy - Výsluní - Vysoká Pec

Chomutov District borders Germany in the north. The district consists of two distinct parts, the forested and mountainous landscape in the northwest and the flat, mainly agricultural landscape in the southeast. The territory extends into three geomorphological mesoregions: Most Basin (south and east), Ore Mountains (north and west), and Doupov Mountains (small part in the southwest). The highest point of the district and the entire Ústí nad Labem Region is a contour line below the top of the Klínovec Mountain in Loučná pod Klínovcem with an elevation of 1,231 metres (4,039 ft), the highest peak is the nearby Macecha at 1,113 m (3,652 ft). The lowest point is the river bed of the Ohře in Březno at 220 m (720 ft).

From the total district area of 935.7 km (361.3 sq mi), agricultural land occupies 387.9 km (149.8 sq mi), forests occupy 360.3 km (139.1 sq mi), and water area occupies 31.0 km (12.0 sq mi). Forests cover 38.5% of the district's area.

The most important river is the Ohře, which flows across the southern part of the territory. Notable are the rivers Bílina and Chomutovka that originates here and drain the northern part. The largest bodies of water are the reservoirs Nechranice (the sixth largest reservoir in the country) and Přísečnice. There are also several ponds and the artificial lake Kamencové jezero.

There are no large-scale protected areas.

Historical population

Year Pop. ±% 1869 92,652 —     1880 105,468 +13.8% 1890 114,283 +8.4% 1900 125,444 +9.8% 1910 136,393 +8.7%	Year Pop. ±% 1921 134,596 −1.3% 1930 147,744 +9.8% 1950 85,715 −42.0% 1961 93,967 +9.6% 1970 103,735 +10.4%	Year Pop. ±% 1980 118,043 +13.8% 1991 124,081 +5.1% 2001 124,988 +0.7% 2011 122,166 −2.3% 2021 119,240 −2.4%
Source: Censuses

Name	Population	Area (km)
Chomutov	47,023	29
Jirkov	19,323	17
Kadaň	18,165	66
Klášterec nad Ohří	14,175	54
Vejprty	2,776	10
Spořice	1,558	17
Březno	1,439	46
Údlice	1,322	12
Radonice	1,174	32
Vysoká Pec	1,174	20

The largest employers with headquarters in Chomutov District and at least 500 employees are:

Economic entity	Location	Number of employees	Main activity
Severočeské doly	Chomutov	2,500–2,999	Coal mining
HOPI	Klášterec nad Ohří	1,000–1,499	Transport and storage
Magna Automotive (CZ)	Spořice	1,000–1,499	Automotive industry
Alleima CZ	Chomutov	500–999	Manufacture of metal pipes
Parker Hannifin Industrial	Chomutov	500–999	Manufacture of hydraulic and pneumatic systems
Povodí Ohře	Chomutov	500–999	Water treatment
PULS investiční	Chomutov	500–999	Manufacture of electrical equipment
Kadaň Hospital	Kadaň	500–999	Health care
Donaldson Czech Republic	Klášterec nad Ohří	500–999	Manufacture of filters
Toyoda Gosei Czech	Klášterec nad Ohří	500–999	Automotive industry
ZF Electronics	Klášterec nad Ohří	500–999	Manufacture of keyboards

The D7 motorway from Prague leads to Chomutov.

Mědník Hill in Měděnec was designated a UNESCO World Heritage Site in 2019 as part of the transnational Ore Mountain Mining Region.

The most important monuments in the district, protected as national cultural monuments, are:

• Franciscan monastery with the Church of the Fourteen Holy Helpers in Kadaň
• Kadaň Town Hall

The best-preserved settlements and landscapes, protected as monument reservations and monument zones, are:

• Kadaň (monument reservation)
• Chomutov
• Klášterec nad Ohří
• Mašťov
• Mining landscape Háj–Kovářská–Mědník

The most visited tourist destination is the Chomutov Zoo.

• Chomutov District – profile on the Czech Statistical Office website