Warming every decade.
Safest among six metros.
236 million Metro rides a year.
Kolkata in data: 19 domains, 30+ open datasets, one city's full portrait.
Safest major metro (2023)
84.1per 100K
IPC/BNS crime rate per lakh (NCRB 2024) — lowest of any major Indian metro. Bengaluru is 4.9x higher, Delhi 20x.
India's oldest metro, fully recovered
236Mjourneys
FY2025-26, an all-time high. From an 87.6% COVID drop to a complete rebound — the arc of India's first underground railway.
Explore the dataHospital beds: a regional medical hub
63per 10,000 (2011)
Beds per 10,000 residents vs about 18 for India — though Kolkata's hospitals serve patients from across eastern India, so the per-resident ratio overstates local supply.
Explore the dataWetland cover inside a Ramsar site
33.4sq km
Land classified as wetland inside the East Kolkata Wetlands' 125 sq km Ramsar boundary, down from 91.2 sq km in 1991, per one satellite study (Yadav et al. 2024).
Explore the dataKolkata's warming
+0.03°C per decade
How well do you know Kolkata?
Among India's 6 major metros, Kolkata's crime rate ranks:
Explore the Data
People & Places
Demographics
125 years of Census data, religion, language, ward-level socio-economics.
Census 2011 · 2011-01
Map
Interactive choropleth of 141 wards.
UpdatedWetlands & Green Space
East Kolkata Wetlands: legal boundary vs measured wetland. KMC green and blue space share.
Ramsar RIS + Yadav 2024 · 2026-11-10
Environment & Climate
Climate
75 years of warming data from IMD.
IMD + Open-Meteo · 2026-11-11
UpdatedAir Quality
Winter inversions trap pollution. Daily AQI since 2022.
Open-Meteo CAMS · 2026-11-11
UpdatedExtreme Rainfall
IMD-recorded downpours: 251.4 mm on 23 Sep 2025, Amphan, Dana.
IMD press releases · 2026-11-10
UpdatedWaterlogging & Drainage
337 KMC-listed pockets by ward, 11 I&WD pumping stations.
KMC Monsoon Book 2021 + I&WD · 2026-11-10
Health & Society
Healthcare
97.5% institutional births but 58% women anemic.
NFHS-5 2019-21 · 2021-01
Education
86.6% govt schools, 99.6% have electricity, 35% have computer labs.
UDISE+ 2024-25 · 2024-09
Crime
Lowest crime rate of any major metro at 84.1 per lakh.
NCRB 2024 · 2024-12
UpdatedDisease
Dengue and malaria: KMC counts and West Bengal NCVBDC data.
NCVBDC + KMC (press) · 2026-11
Economy & Infrastructure
Transport
Metro recovery, road deaths, 40-year ridership.
Metro Railway FY26 + MoRTH 2024 · 2026-03
Budget
A decade of KMC budget estimates: always in deficit, 54% grant-funded.
KMC Budget Estimate 2026-27 · 2026-03
Real Estate
NHB index up 6.9% year on year (Jun 2026); 6.2% a year over five years.
NHB RESIDEX · 2026-06
Employment
First official Kolkata job figures (PLFS 2025): women's participation 29.5%, 3 in 4 workers in services.
PLFS 2025 (Kolkata MC) · 2025-12
Energy
WB per-capita power is 64% of the national figure (893 vs 1,400 kWh); CESC T&D loss 6.9%.
CEA 2023-24 + CESC · 2024-03
Digital
Broadband up nearly 7x since 2015; mobile subscriptions flat.
TRAI PIR + CPGRAMS · 2026-06
Judiciary
Bengal courts clear 64 of 100 new cases; 11.1 judges per million.
NJDG via RS + IJR 2025 · 2026-07
Open-Meteo API — Weather & Air Quality
India Meteorological Dept (OpenCity.in) — Temperature 1951-2024
National Crime Records Bureau (OpenCity.in) — Crime 2022-2024
National Family Health Survey (NFHS-5) — Healthcare Indicators
Unified District Info System for Education (OpenCity.in) — Education Data
Kolkata Metro / Indian Railways — Ridership
MoRTH Road Accidents in India + WB Traffic Police — Road Accidents 2018-2024
Census 2011 — Demographics & Amenities
KMC Budget Estimate Vol-II and budget speeches — Revenue Fund 2017-2027
Official hospital websites + Census 2011 District Census Handbook — Hospital infrastructure
NHB RESIDEX (HPI@Assessment, Jun 2013–Jun 2026) + RBI HPI published Kolkata rates — Real Estate
Periodic Labour Force Survey (PLFS) — Employment 2017-2025 (WB urban; Kolkata MC 2025)
e-Shram (PIB) — West Bengal state registration total only
Central Electricity Authority (CEA) General Review + CESC annual reports — Energy 2018-19 to 2023-24
TRAI Performance Indicator Reports — Kolkata LSA telecom subscribers, 2015-2026
CPGRAMS (DARPG) — Grievance statistics for central ministries (national) and West Bengal government, 2023-2026
NCVBDC (West Bengal) + KMC via press — Dengue & Malaria 2018-2026
IMD press releases — Kolkata extreme rainfall events 2020-2025 (no official river-level series exists)
NJDG (via Rajya Sabha answers) + India Justice Report 2022/2025 + Calcutta HC statements — Judiciary 2018-2026
Paul & Bardhan 2022 (IRSPSD) — KMC green and blue space, 2020
Ramsar Information Sheet 2002 + Yadav et al. 2024 — East Kolkata Wetlands
OpenCity.in ward-level results (2010, 2015) + Wikipedia (2021) — KMC Elections
Demographics & Wards — KMC (city proper) as in Census 2011: 141 wards, 185 sq km (KMC now has 144 wards). Source: Census 2011.
Climate — Alipore Observatory (IMD station, south Kolkata, within KMC) + Open-Meteo reanalysis (~25 km grid cell).
Air Quality — Open-Meteo / CAMS atmospheric model (~40 km grid cell centred on Kolkata). Modeled, not station-observed.
Healthcare — Kolkata district (185 sq km; coincided with KMC at Census 2011). Source: NFHS-5.
Education — Kolkata education district (~185 sq km, approx. matches revenue district). Source: UDISE+.
Crime — Kolkata Police Commissionerate (~530 sq km, ~2.5x larger than KMC). Source: NCRB.
Transport — Mixed: Metro network (cross-boundary), city accidents (Kolkata Police area), state data (all West Bengal), NH data (national highways).
Budget — KMC Revenue Fund (~206 sq km). Source: Mayor's Budget Estimate Vol-II; grant-funded suspense heads excluded.
Real Estate — NHB RESIDEX and RBI HPI are city-level indices from bank/HFC valuations (NHB) and RBI city data; index levels are not comparable across cities.
Employment — Kolkata Municipal Corporation for 2025 (PLFS city estimates); urban West Bengal for 2017-18 to 2023-24. No Kolkata-level e-Shram data.
Energy — State-level (WB) for CEA data; CESC licence area (~567 sq km across Kolkata, Howrah, Hooghly and North & South 24 Parganas, larger than KMC) for city figures.
Digital — Kolkata telecom circle (TRAI); tele-density is published only for West Bengal incl. Kolkata; CPGRAMS figures are national or West Bengal government, not Kolkata.
Disease — Kolkata figures are KMC-area dengue and malaria counts reported in the press; West Bengal figures are state-wide NCVBDC tables. The two are never combined.
Rainfall — IMD Alipore station figures from IMD press releases. Waterlogging — KMC Monsoon Book 2021 (KMC area, 144 wards).
Judiciary — all West Bengal district & subordinate courts (Kolkata-only figures not public); Calcutta High Court incl. Jalpaiguri & Port Blair benches. Sources: NJDG via Rajya Sabha answers, India Justice Report.
Wetlands & Green Space — EKW figures use the 12,500 ha Ramsar site boundary. Green and blue space covers the KMC area (2020 mapping, Census 2011 population).
Population (home page) — Urban Agglomeration (includes Howrah, Salt Lake, etc.). 2026 figure is a UN World Urbanization Prospects 2018 projection; 14.1M at Census 2011.