Light pollution in United Kingdom

173 cities · estimated Bortle class at each city centre

17 of 173 cities read Bortle 8–9 · 86 of 173 cities read Bortle 7–8 · 64 of 173 cities read Bortle 6–7 · 3 of 173 cities read Bortle 5–6 · 3 of 173 cities read Bortle 4–5. The darkest city centre on the list is Loughton (Bortle 4–5).

Interactive light pollution map → All countries →

Cities, brightest first

#	City	Bortle (est.)	Brightness	2 classes darker
1	London	8–9	255	~25 km SSE
2	Harrow	8–9	255	~25 km NW
3	Manchester	8–9	255	~25 km E
4	Birmingham	8–9	255	~25 km SSE
5	Enfield Town	8–9	251	~25 km ENE
6	Leeds	8–9	255	~25 km NW
7	Romford	8–9	252	~25 km NNE
8	Bexley	8–9	231	~25 km S
9	Sutton	8–9	237	~25 km SW
10	Glasgow	8–9	255	~25 km N
11	Liverpool	8–9	255	~25 km NW
12	Wolverhampton	8–9	255	~25 km SW
13	St Helens	8–9	255	~25 km S
14	Newcastle upon Tyne	8–9	255	~25 km ENE
15	Slough	8–9	255	~25 km WNW
16	Bolton	8–9	255	~25 km NE
17	Nottingham	8–9	255	~25 km ESE
18	Gravesend	7–8	239	~25 km SSW
19	Huddersfield	7–8	255	~25 km S
20	Middlesbrough	7–8	255	~25 km NE
21	Sheffield	7–8	255	~25 km WNW
22	Sunderland	7–8	255	~25 km ENE
23	Pontefract	7–8	253	~25 km NE
24	Edinburgh	7–8	255	~25 km NE
25	St Albans	7–8	236	~25 km WNW
26	Derby	7–8	255	~25 km NW
27	Rochdale	7–8	255	~25 km SE
28	Coventry	7–8	255	~25 km SSE
29	Belfast	7–8	255	~25 km ESE
30	Basildon	7–8	232	~25 km NE
31	Barnsley	7–8	238	~25 km SW
32	Leicester	7–8	255	~25 km E
33	Doncaster	7–8	255	~25 km ESE
34	Stoke-on-Trent	7–8	255	~25 km ENE
35	Bristol	7–8	255	~25 km W
36	Mansfield	7–8	240	~25 km W
37	Bracknell	7–8	255	~25 km NW
38	Cardiff	7–8	255	~25 km SSW
39	Milton Keynes	7–8	255	~25 km WNW
40	Kingston upon Hull	7–8	250	~25 km ENE
41	Livingston	7–8	255	~25 km SE
42	Luton	7–8	251	~25 km ENE
43	Newport	7–8	254	~25 km NE
44	Preston	7–8	255	~25 km NNE
45	Chester	7–8	253	~25 km SW
46	Cumbernauld	7–8	251	~25 km NNW
47	Southampton	7–8	255	~25 km SSW
48	Reading	7–8	254	~25 km N
49	Tamworth	7–8	252	~25 km NNW
50	Chesterfield	7–8	231	~25 km NW
51	Peterborough	7–8	254	~25 km NW
52	Woking	7–8	205	~25 km S
53	Hinckley	7–8	254	~25 km ESE
54	Portsmouth	7–8	255	~25 km SSE
55	Harlow	7–8	251	~25 km N
56	Redditch	7–8	219	~25 km SE
57	Bournemouth	7–8	223	~25 km SSE
58	Maidstone	7–8	229	~25 km S
59	Burton upon Trent	7–8	255	~25 km N
60	Durham	7–8	217	~25 km W
61	Oxford	7–8	253	~25 km NNW
62	Southend-on-Sea	7–8	255	~25 km E
63	Swansea	7–8	255	~25 km SW
64	Aberdeen	7–8	255	~25 km ENE
65	Telford	7–8	255	~25 km WSW
66	Blackpool	7–8	253	~25 km WSW
67	Northwich	7–8	205	~25 km SW
68	Brighton	7–8	255	~25 km S
69	Blyth	7–8	232	~25 km NE
70	Burnley	7–8	248	~25 km NNW
71	Swindon	7–8	250	~25 km NW
72	Keighley	7–8	245	~25 km N
73	Sittingbourne	7–8	249	~25 km NE
74	High Wycombe	7–8	234	~25 km NW
75	Plymouth	7–8	255	~25 km SSE
76	Grimsby	7–8	255	~25 km E
77	Crawley	7–8	252	~25 km ESE
78	York	7–8	255	~25 km N
79	Worksop	7–8	245	~25 km NE
80	Bedford	7–8	251	~25 km E
81	Dunfermline	7–8	240	~25 km E
82	Ipswich	7–8	234	~25 km ESE
83	Aldershot	7–8	213	~25 km SSE
84	Stafford	7–8	249	~25 km WNW
85	Norwich	7–8	255	~25 km NE
86	Crewe	7–8	245	~25 km SW
87	Kilmarnock	7–8	255	~25 km WSW
88	Rugby	7–8	251	~25 km SSE
89	Southport	7–8	255	~25 km NW
90	Cambridge	7–8	235	~25 km N
91	Darlington	7–8	244	~25 km WSW
92	Coalville	7–8	193	~25 km ENE
93	Gloucester	7–8	252	~25 km W
94	Northampton	7–8	194	~25 km WSW
95	Scunthorpe	7–8	244	~25 km SSE
96	Kidderminster	7–8	243	~25 km WNW
97	Stirling	7–8	247	~25 km WNW
98	Greenock	7–8	245	~25 km NW
99	Letchworth Garden City	7–8	202	~25 km E
100	Worcester	7–8	244	~25 km W
101	Bridgend	7–8	244	~25 km SSW
102	Lincoln	7–8	255	~25 km ESE
103	Dundee	7–8	255	~25 km ESE
104	Ashford	6–7	255	~25 km SE
105	Chelmsford	6–7	248	~25 km E
106	Wrexham	6–7	254	~25 km WSW
107	Kirkcaldy	6–7	250	~25 km E
108	Worthing	6–7	236	~25 km S
109	Macclesfield	6–7	220	~25 km ESE
110	Bicester	6–7	251	~25 km WNW
111	Rushden	6–7	195	~25 km NNE
112	Corby	6–7	234	~25 km N
113	Bangor	6–7	226	~25 km NE
114	Leighton Buzzard	6–7	217	~25 km W
115	Meikle Earnock	6–7	84	~25 km S
116	Exeter	6–7	255	~25 km SE
117	Londonderry County Borough	6–7	248	~25 km NE
118	Colchester	6–7	233	~25 km SSE
119	Basingstoke	6–7	229	~25 km SE
120	Harrogate	6–7	235	~25 km WNW
121	Aylesbury	6–7	255	~25 km SSW
122	Ayr	6–7	221	~25 km WSW
123	Canterbury	6–7	251	~25 km NNE
124	Newbury	6–7	214	~25 km W
125	Craigavon	6–7	229	~25 km N
126	Salisbury	6–7	241	~25 km SSE
127	Carlisle	6–7	248	~25 km E
128	Taunton	6–7	240	~25 km NNW
129	Newark on Trent	6–7	188	~25 km S
130	Royal Tunbridge Wells	6–7	225	~25 km SE
131	Bury St Edmunds	6–7	247	~25 km N
132	Yeovil	6–7	242	~25 km SW
133	Saint Neots	6–7	201	~50 km NE
134	Inverness	6–7	255	~25 km WSW
135	Banbury	6–7	254	~25 km WSW
136	Weston-super-Mare	6–7	242	~25 km WSW
137	Grantham	6–7	238	~25 km E
138	Boston	6–7	254	~25 km E
139	Morecambe	6–7	213	~25 km WSW
140	Llanelli	6–7	244	~25 km WSW
141	Perth	6–7	244	~25 km NNW
142	Spalding	6–7	231	~25 km ENE
143	Winchester	6–7	213	~25 km WSW
144	Stratford-upon-Avon	6–7	193	~25 km S
145	King's Lynn	6–7	216	~25 km NNW
146	Bognor Regis	6–7	185	~25 km S
147	Shrewsbury	6–7	212	~25 km SSW
148	Wisbech	6–7	218	~25 km NNE
149	Paignton	6–7	195	~25 km SE
150	Chippenham	6–7	190	~25 km NNW
151	Folkestone	6–7	224	~25 km S
152	Dumfries	6–7	246	~25 km S
153	Hastings	6–7	229	~25 km SSE
154	Eastbourne	6–7	221	~25 km SSW
155	Barnstaple	6–7	238	~25 km WNW
156	Barrow in Furness	6–7	252	~25 km WNW
157	Ebbw Vale	6–7	154	~25 km N
158	Braintree	6–7	182	~25 km SE
159	Hereford	6–7	245	~25 km W
160	Redruth	6–7	207	~25 km NW
161	Lowestoft	6–7	248	~25 km ENE
162	Saint Peters	6–7	175	~25 km ENE
163	Scarborough	6–7	254	~25 km ENE
164	Weymouth	6–7	220	~25 km SSW
165	Andover	6–7	182	~25 km SSW
166	Bath	6–7	150	~25 km S
167	Clacton-on-Sea	6–7	185	~25 km ESE
168	Bridlington	5–6	173	~25 km E
169	Deal	5–6	113	~25 km ENE
170	Rhondda	5–6	27	~50 km SW
171	Mendip	4–5	21	not within 90 km
172	High Peak	4–5	18	not within 90 km
173	Loughton	4–5	18	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.