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41300 · Previous Postal Code
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Postal Code 41400 - Gebze, Kocaeli Province

Primary CityGebze
Area of Postal Code 41400416.7 km²
Male Population79,365 (50.9%)
Female Population76,689 (49.1%)
Population change from 1975 to 2015 -10.8%
Population change from 2000 to 2015 -20.3%
Median Age28.2 years
Male Median Age28.3 years
Female Median Age28 years
NeighborhoodsArapçeşme Mahallesi, Barış Mahallesi, Güzeller Mahallesi, Hacıhalil Mahallesi, Köşklü Çeşme Mahallesi, Mustafapaşa Mahallesi, Osman Yılmaz Mahallesi, Sultan Orhan Mahallesi, Tatlıkuyu Mahallesi
Local TimeTuesday 4:52 PM
Coordinates40.91633208750803° / 29.551239591191138°
Related Postal Codes413004141041420414354144041455

Map of Postal Code 41400

Interactive Map

Postal Code 41400 Population

Years 1975 to 2015
Population Density419.9 / km²528.1 / km²469.8 / km²374.5 / km²
Sources: JRC (European Commission's Joint Research Centre) work on the GHS built-up grid

41400 Population change from 2000 to 2015

Decrease of 20.3% from year 2000 to 2015
LocationChange since 1975Change since 1990Change since 2000
Postal Code 41400-10.8%-29.1%-20.3%
Sources: JRC (European Commission's Joint Research Centre) work on the GHS built-up grid

Postal Code 41400 Median Age

Median Age: 28.2 years
LocationMedian AgeMedian Age (Female)Median Age (Male)
Postal Code 4140028.2 years28 years28.3 years
Kocaeli30 years30.1 years29.9 years
Turkey29.2 years29.8 years28.7 years
Sources: CIESIN (Center for International Earth Science Information Network)

Postal Code 41400 Population Tree

Population By Age and Gender
Under 57,4517,05514,506
85 Plus113222336
Sources: CIESIN (Center for International Earth Science Information Network)

Postal Code 41400 Population Density

Population Density: 374.5 / km²
LocationPopulationAreaPopulation Density
Postal Code 41400156,054416.7 km²374.5 / km²
Kocaeli1.5 million3,550.8 km²409.4 / km²
Turkey77.8 million780,782.9 km²99.6 / km²
Sources: JRC (European Commission's Joint Research Centre) work on the GHS built-up grid

Postal Code 41400 Historical Population

Estimated Ancient Population until 2015
1. JRC (European Commission's Joint Research Centre) work on the GHS built-up grid
2. CIESIN (Center for International Earth Science Information Network)
3. [Link] Klein Goldewijk, K., Beusen, A., Doelman, J., and Stehfest, E.: Anthropogenic land use estimates for the Holocene – HYDE 3.2, Earth Syst. Sci. Data, 9, 927–953,, 2017.


Business Distribution by neighborhood in 41400
 Hacıhalil Mahallesi: 13.2%
 Sultan Orhan Mahallesi: 10.8%
 Osman Yılmaz Mahallesi: 7.6%
 Güzeller Mahallesi: 5.2%
 Tatlıkuyu Mahallesi: 5.1%
 Other: 58.1%

Business Concentration in Postal Code 41400

41400 Business Heat Map


Business Distribution by Industry
 Shopping: 22.2%
 Restaurants: 12.2%
 Industry: 10.8%
 Professional Services: 9.4%
 Food: 7.5%
 Automotive: 6.7%
 Other: 31.1%
Industry DescriptionNumber of EstablishmentsAverage Google RatingBusinesses per 1,000 residents
Health and medical663.40.4

Business distribution by price for Postal Code 41400

 Moderate: 53%
 Inexpensive: 26.7%
 Expensive: 12.6%
 Very Expensive: 7.7%

Human Development Index (HDI)

Statistic composite index of life expectancy, education, and per capita income.
Sources: [Link] Kummu, M., Taka, M. & Guillaume, J. Gridded global datasets for Gross Domestic Product and Human Development Index over 1990–2015. Sci Data 5, 180004 (2018) doi:10.1038/sdata.2018.4

Postal Code 41400 CO2 Emissions

Carbon Dioxide (CO2) Emissions Per Capita in Tonnes Per Year
LocationCO2 EmissionsCO2 Emissions Per CapitaCO2 Emissions Intensity
Postal Code 414001,029,393 t6.6 t2,470 t/km²
Kocaeli9,337,525 t6.42 t2,629 t/km²
Turkey435,645,811 t5.6 t558 t/km²
Sources: [Link] Moran, D., Kanemoto K; Jiborn, M., Wood, R., Többen, J., and Seto, K.C. (2018) Carbon footprints of 13,000 cities. Environmental Research Letters DOI: 10.1088/1748-9326/aac72a

Postal Code 41400 CO2 Emissions

2013 CO2 emissions (tonnes/year)1,029,393 t
2013 CO2 emissions (tonnes/year) per capita6.6 t
2013 CO2 emissions intensity (tonnes/km²/year)2,470 t/km²

Natural Hazards Risk

Relative risk out of 10
FloodHigh (7)
EarthquakeHigh (8)
* Risk, particularly concerning flood or landslide, may not be for the entire area.

Recent Nearby Earthquakes

Magnitude 3.0 and greater
6/24/1610:40 PM4.137 km6,800 m6km NE of Korukoy,
1/19/116:09 PM4.129.1 km11,800 mwestern
10/21/086:00 PM3.636.9 km9,400 mwestern
5/15/048:30 PM4.431.2 km11,000 mwestern
9/19/002:22 AM3.633.9 km10,000 mwestern
7/6/005:15 PM4.229.4 km8,800 mwestern
4/3/003:17 AM3.222.7 km10,000 mwestern
1/31/006:38 AM4.128.5 km10,000 mwestern
10/22/997:49 PM3.137.7 km7,000 mwestern
10/3/999:19 AM3.133.2 km13,100 mwestern

Find historical earthquake occurrences near Postal Code 41400

Earliest Date  Latest Date 
 Magnitude 3.0 and greater   Magnitude 4.0 and greater   Magnitude 5.0 and greater 

Primary City

Gebze (Turkish pronunciation: [ˈɟebze], ancient names: Dakibyza and Libyssa, Λίβυσσα in Ancient greek) is a district in Kocaeli Province, Turkey. It is situated 30 miles east of Istanbul, on the northern shore of the Sea of Marmara. Gebze is the seco..  ︎  Gebze Wikipedia Page


Percentage of businesses by city in 41400
 Gebze: 90.8%
 İzmit: 7.6%
 Other: 1.6%

About Our Data

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