Light pollution in Bangladesh

27 cities · estimated Bortle class at each city centre

4 of 27 cities read Bortle 8–9 · 10 of 27 cities read Bortle 7–8 · 6 of 27 cities read Bortle 6–7 · 3 of 27 cities read Bortle 5–6 · 3 of 27 cities read Bortle 4–5 · 1 of 27 cities read Bortle 1–4. The darkest city centre on the list is Karnaphuli (Bortle 1–4).

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Cities, brightest first

#	City	Bortle (est.)	Brightness	2 classes darker
1	Dhaka	8–9	255	~25 km SW
2	Gazipur	8–9	243	~25 km NE
3	Chattogram	8–9	255	~25 km W
4	Savar	8–9	227	~25 km S
5	Comilla	7–8	249	~25 km SW
6	Narsingdi	7–8	237	~25 km NNE
7	Brāhmanbāria	7–8	239	~25 km NNE
8	Rajshahi	7–8	255	~25 km NW
9	Khulna	7–8	240	~25 km SW
10	Sylhet	7–8	255	~25 km N
11	Mymensingh	7–8	252	~25 km SE
12	Bogra	7–8	255	~25 km E
13	Rangpur	7–8	255	~25 km SE
14	Jessore	7–8	239	~25 km S
15	Dinajpur	6–7	255	~25 km NNW
16	Barishal	6–7	223	~25 km NW
17	Hāthazāri	6–7	118	~25 km WSW
18	Natore	6–7	223	~25 km SW
19	Chāndpur	6–7	236	~25 km SSW
20	Bagerhat	6–7	205	~25 km ENE
21	Cox’s Bāzār	5–6	78	~25 km SW
22	Bāndarban	5–6	90	~50 km WSW
23	Shibganj	5–6	66	not within 90 km
24	Nāgarpur	4–5	27	not within 90 km
25	Nagar Naluākot	4–5	17	not within 90 km
26	Mohammadpur	4–5	18	not within 90 km
27	Karnaphuli	1–4	12	not within 90 km

Brightness is the NASA VIIRS Black Marble 2016 value at the city centre on a 0–255 scale; 255 is saturated. Cities are ordered by estimated sky brightness, which also counts the light within 30 km.