S17 postcode district: Sheffield and around
S17 is a postcode district in England, with 366 postcodes in use in 3 sectors. It has postcodes in Sheffield. It is split between 2 councils: Sheffield (363 postcodes) and North East Derbyshire (3). 3 of its 366 postcodes are in Derbyshire. ONS lists no county for the other 363.
- Postcodes in use
- 366
- Sectors
- 3
- Councils
- 2 councils
- Places
- Sheffield
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in S17, by flood risk
- A home or business at high risk: 17
- At medium risk at worst: 5
- At low risk at worst: 8
- At very low risk only: 0
- Not on the at-risk list: 336
- Outline: where 5 or more postcodes at high or medium risk lie together
Of the 366 postcodes in S17 that ONS places, 17 have a home or business at high risk, 5 are at medium risk at worst, 8 are at low risk at worst and 336 are not on the Environment Agency's at-risk list.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 160 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.
The middle of its postcodes: latitude 53.3213, longitude -1.5290. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
The postcodes at high risk
17 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.
Beside each: how many of its homes and businesses the Environment Agency puts at that risk.
6 further out, not drawn
These postcodes lie well apart from the rest, so the map is drawn without them to show the rest closer; they are in every count.
Where the postcodes at high or medium risk lie together
- 8 postcodes at high or medium risk, outlined on the map. S17 3LX, is the one with most homes and businesses at high risk.
What broadband can you get in S17?
Ofcom reports on 357 of the 366 postcodes in S17. At 298 of them every home and business can get gigabit broadband, and at 1 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
Is S17 at risk of flooding?
30 of the 366 postcodes in S17 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 60 homes and businesses in an area at high or medium risk.
High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.
Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.
Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it
What do homes sell for in S17?
Homes in S17 sold for a typical £460,000 in the 12 months to August 2026, across 183 sales, up 0.7% on the 12 months before, HM Land Registry's figures show.
- 12 months to August 2025
- £457,000
- 12 months to August 2026
- £460,000
▲ up 0.7% on the 12 months before
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in S17
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in S17
Towns and villages with postcodes in S17, and how many each has here.
Who covers S17
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
What council am I in?Constituencies
- Sheffield Hallam361
- North East Derbyshire3
- Sheffield Heeley2
Police force areas
- South Yorkshire363
- Derbyshire3
Next to S17
"Next to" is by number: the districts before and after S17 in the S area.
Check a postcode
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