The Square Mile is the colloquial name for the City of London, the historic financial and commercial heart of the UK capital. It covers approximately 1.12 square miles (about 2.9 square kilometers), giving it its informal name, and is one of the two cities that together make up Greater London. The other is the City of Westminster, which is geographically larger but does not share the same medieval-into-modern continuity.
The Square Mile is unique in British civic terms: it has its own local authority (the City of London Corporation), its own Lord Mayor (separate from the Mayor of London), its own police force (City of London Police, separate from the Metropolitan Police), and its own ceremonial traditions dating back over 1,000 years. It is home to the Bank of England, the London Stock Exchange, the Royal Exchange, the Old Bailey, St. Paul's Cathedral, and tens of thousands of financial and professional services firms.
This guide is for anyone trying to understand the Square Mile properly: tourists planning a visit, residents weighing the area, students looking at City University or BPP, and anyone curious about the brand Square Mile Coffee Roasters, which is named after this place.
The Square Mile, London, at a glance
| Category | Detail | Notes |
| Official name | City of London | One of two cities in Greater London |
| Area | 1.12 square miles (2.9 km²) | Hence "the Square Mile" |
| Resident population | About 10,000 | Most non-residents are commuters |
| Daily worker population | About 500,000+ | Among densest in UK |
| Main postcodes | EC1, EC2, EC3, EC4 | EC = "Eastern Central" |
| Governing body | City of London Corporation | Pre-dates modern UK government |
| Notable institutions | Bank of England, Stock Exchange, Royal Exchange, Old Bailey | Plus St Paul's Cathedral, Bevis Marks Synagogue |
| Closest universities | City, University of London (fringes); BPP University | Bayes Business School (Cass) nearby |
| Tube stations | Bank, Liverpool Street, Moorgate, Mansion House, St Paul's, Cannon Street | All Zone 1 |
The Square Mile's character, briefly
This is a small area with an outsized role. Some context that shapes how the Square Mile feels:
The Roman origins of London were here. Londinium was founded by the Romans around 47 AD on what is now the Square Mile. The City Wall (visible in fragments near Tower Hill and the Barbican) traced the boundary that gives the city its current shape.
The financial concentration is real. The Square Mile hosts the headquarters of major UK and international banks, insurance companies, law firms, and asset managers. The "City" in British media language ("City reaction to today's news") refers to this place specifically.
The architecture is layered, from medieval (Guildhall, Bevis Marks Synagogue) to Wren-baroque (St. Paul's, dozens of city churches) to Victorian (Royal Exchange, Tower Bridge) to modernist (Lloyd's of London, the Gherkin) to contemporary (Leadenhall Building, 22 Bishopsgate). Few parts of London have so many architectural styles in such a compact area.
The weekend dynamics are notable. Monday through Friday during business hours, the Square Mile is one of the most densely populated business districts in the world. On Saturdays and Sundays, the population drops to nearly residential levels, with most pubs, cafés, and shops closed by 6pm. Tourists shift this pattern at the major landmarks.
Top things to do in the Square Mile
A short list of what genuinely matters:
St. Paul's Cathedral. Christopher Wren's 1710 masterpiece dominates the city skyline. Climb to the Whispering Gallery and the Golden Gallery (the highest accessible point) for one of London's best views.
Tower of London (technically just outside the Square Mile boundary). Home to the Crown Jewels, with 1,000 years of history, including the medieval royal palace, the Tudor execution site, and the Bloody Tower.
Museum of London (currently relocating to Smithfield). Reopening at its new West Smithfield home with the largest collection of London's history.
The Monument. Wren's 202-foot column commemorating the Great Fire of London (1666), with a public viewing platform at the top.
Sky Garden at 20 Fenchurch Street. The "Walkie Talkie" tower's free public sky garden, with one of London's most photographed views.
Leadenhall Market. A Victorian covered market that has appeared in Harry Potter films, with a few pubs and cafés.
Smithfield Market. The wholesale meat market is open from the early hours, with a number of late-night pubs in the surrounding area.
Guildhall. The medieval seat of city government, with a museum and the Guildhall Art Gallery.
Square Mile Coffee Roasters: the brand named after this place
If you searched for "Square Mile Coffee Roasters London," you're looking for a specific London-based specialty coffee company. Square Mile Coffee Roasters was founded in 2008 by James Hoffmann and Anette Moldvær, both former world barista champions. The roastery has become one of the most influential specialty coffee operations in Europe, supplying many of London's third-wave coffee shops.
The company is based in east London (in Pritchard's Road, Bethnal Green, just outside the actual Square Mile geographic boundary). The name is a nod to London's financial district and the company's London roots. Square Mile Coffee Roasters operates a wholesale roastery rather than retail coffee shops, but its beans are served at hundreds of cafés across London. If you're searching for a coffee shop run by Square Mile specifically, look for the cafés that brand themselves as serving Square Mile beans.
For a coffee-focused walk through the Square Mile itself, the City has dozens of independent specialty coffee shops, many serving Square Mile beans or competing roasters. Notable City coffee shops include Workshop Coffee, Department of Coffee and Social Affairs, Black Sheep, and the Watch House (in nearby Bermondsey).
The Square Mile for students
Two universities have meaningful Square Mile presence:
The City, University of London, sits on the edge of the Square Mile, with main campus buildings on Northampton Square (technically in Islington, but practically at the city's northern boundary). For City students, the Square Mile is essentially next door.
BPP University has a London City campus in the Buckingham Palace Road area but uses city venues for some teaching.
Bayes Business School (formerly Cass Business School, part of City University) is at 106 Bunhill Row, on the city's northern edge.
For students living in or near the Square Mile:
Living in the Square Mile is expensive. Average rents at premium PBSAs and BTR buildings in the EC postcodes run £350-£500+ per week, well above mid-range London PBSA pricing. The trade-off is location: you walk to most central London universities.
Better-value alternatives nearby include PBSAs in Shoreditch, Aldgate, Old Street, Whitechapel, and the South Bank. The tube ride to City University or BPP is 5-15 minutes from any of these.
Working in the Square Mile during studies is a strong career-development angle. Many city firms run internship and graduate programs specifically aimed at London university students, and proximity to the financial district can be a real career asset for students in business, law, or related fields.
Practical visiting information
Best time to visit: Weekdays (Monday-Friday) during business hours give you the full city buzz. Weekends are quieter but more peaceful for sightseeing.
How to get around: The city is genuinely walkable. The tube stations (Bank, Liverpool Street, St. Paul's, Mansion House, Moorgate, and Cannon Street) all sit within the area. Walking from Tower Hill to St. Paul's takes about 25 minutes.
Where to eat: Lunchtime is the city's strongest food window, with hundreds of restaurants, food halls, and pop-ups catering to office workers. Notable food destinations include Leadenhall Market, Bow Lane, Old Spitalfields Market (just outside), and the major office building food halls at Bloomberg, the Walkie Talkie, and the Cheesegrater.
Where to stay (if you're a tourist): Hotels in the Square Mile range from the historic (Andaz Liverpool Street, Threadneedles) to the modern boutique (M by Montcalm, citizenM). The City is also a quieter alternative to Soho or Covent Garden for visitors who don't need to be in the entertainment district.
FAQs
What is the Square Mile in London?
The Square Mile is the colloquial name for the City of London, the historic financial district covering approximately 1.12 square miles (2.9 km²) in the heart of London. It has its own local authority, lord mayor, and police force, separate from the rest of Greater London.
Why is it called the Square Mile?
Because the City of London covers approximately one square mile in area. The exact area is 1.12 square miles or 2.9 square kilometers.
What is Square Mile Coffee Roasters, London?
Square Mile Coffee Roasters is a specialty coffee company founded in 2008 by James Hoffmann and Anette Moldvær, two former World Barista Champions. The roastery is based in east London (Pritchard's Road, Bethnal Green) and supplies beans to hundreds of London cafés.
What's in the Square Mile in London?
St. Paul's Cathedral, the Tower of London (just outside), the Bank of England, the London Stock Exchange, the Royal Exchange, the Old Bailey, the Sky Garden at 20 Fenchurch Street, Leadenhall Market, Smithfield Market, Guildhall, and the Museum of London (relocating to Smithfield).
How many people live in the Square Mile?
About 10,000 in resident population. The daily worker population is approximately 500,000+, making the City one of the most extreme commuter-to-resident ratios of any urban area in the UK.
Is the Square Mile a city?
Yes. The City of London is one of two cities that together make up Greater London. The other is the City of Westminster. Both are independent cities, with their own civic structures, sitting within the wider Greater London area.
What universities are in the Square Mile?
City, University of London (on the northern edge), BPP University (with a London City campus), and Bayes Business School (formerly Cass Business School, at 106 Bunhill Row). The Square Mile is not a major university district, but several London universities have buildings nearby.
What are the best things to do in the Square Mile, London?
St. Paul's Cathedral, the Sky Garden at 20 Fenchurch Street (free), the Tower of London (just outside), Leadenhall Market, the Monument, Guildhall, and a walk along the Thames Path on the City's southern edge.