First and foremost, there seems to be some inaccurate information out there saying that it was in Islington. The scenes in the film were filmed in Islington, and, from available evidence, Islington could be where Grimmauld Place is located in-universe, however there doesn't appear to be anything in canon sources that definitely say Islington is the place. The filming location for the movie was done at "Claremont Square, Islington, London N1" 1 This may be where the confusion in some sources comes from.
There does not appear to be a real world location for 12 Grimmauld Place. However, with some detective work, some approximations can be made.
Please see the quoted portions below for more detail on how this was ascertained.
This excellent detective work, by Ravenclaw Rambler, uses the books to determine possible locations for Grimmauld place.
Number twelve, Grimmauld Place is the location of much of the action
in Chapters 4 to 10 of Harry Potter and the Order of the Phoenix. It
is Sirius Black’sancestral home, and the headquarters of the Order of
the Phoenix. This essay discusses its possible location, and also that
of the Ministry of Magic.
It has been suggested that Grimmauld Place is in the Tufnell Park area
of north London, with which JKR was familiar. However, this is
two-and-a-half miles from King’s Cross railway station, and a passage
at the beginning of OP10 makes it clear that King’s Cross is only a
twenty-minute walk away—for a large group encumbered by a lot of heavy
luggage. This puts Grimmauld Place about a mile, or a bit less, from
King’s Cross. Grimmauld Place must therefore lie on a circle a little
less than a mile in radius, with King’s Cross at its centre.
What else do we know? Well, in OP7 we have a description of Harry and
Mr. Weasley’s journey by Underground to the Ministry of Magic. There
are several very interesting points about this journey. Firstly, they
walk along several streets to a “miserable little underground
station.” King’s Cross is served by the Underground as well as the
main line station: indeed, with eight platforms, it is one of the
biggest on the Underground network. Clearly King’s Cross does not
answer the description of the station used by Harry and Mr. Weasley.
It is presumably more convenient to use this small station, rather
than King’s Cross, for the journey to the Ministry of Magic. Any
location identified for Grimmauld Place must be consistent with a
plausible reason for not taking the Underground from this station to
go to King’s Cross to catch the Hogwarts Express on September 1st.
Secondly, it is stated several times that the journey on the
Underground takes Harry and Mr. Weasley to the very heart of
London—therefore the station they go to is significantly more central
than the station they started at. Moreover, at one point Mr. Weasley
tells Harry that there are “four more stops”—indicating that they
travel at least four stops, and probably more.
Finally, they arrive at a station which they leave by escalator. This
is significant because in general only the deep-level tube lines built
after 1890 have escalators. The Circle Line and the three other lines
it shares tracks with date from mid-Victorian times, and were
originally worked by steam trains, which of course needed ventilation
to allow the steam to escape. They are much closer to the surface and
their platforms are reached by ordinary stairs.
So, we are looking for somewhere rather insalubrious, a little less
than one mile from King’s Cross, whose nearest tube station is on a
deep level tube line, and from which a journey of four stops or more
on the Underground will take you to a station in central London. Note
that the tube station itself may be more or less than twenty minutes’
walk from King’s Cross.
There are no less than fifteen stations on the London Underground
within a mile of King’s Cross: in alphabetical order they are Angel,
Caledonian Road, Camden Town, Chancery Lane, Euston, Euston Square,
Farringdon, Goodge Street, Great Portland Street, Highbury &
Islington, Holborn, Mornington Crescent, Russell Square, Tottenham
Court Road, and Warren Street. Let us see if we can narrow it down a
King’s Cross is on the northern edge of central London—see map at
A diagrammatic map of the underground network can be found at
Harry and Mr. Weasley travel “towards central London,” so we can
assume that they start from a station that is less central than their
destination. Moreover, if they started too near the centre, a journey
of four or more stops would take them out of the central area.
Let us perform an orbit of King’s Cross, starting in the east, and
working round clockwise.
Due east of King’s Cross, a bit less than a mile away in Islington, is
Angel Station, on the Northern Line. I think we can eliminate this
one, as if you travel four stops north or south you will be heading
away from the centre of London. Interestingly, on Pentonville Road,
leading uphill from King’s Cross to the Angel, there is a small park
named after Joseph Grimaldi (1779 – 1837) the father of modern circus
clowning, who was buried in this former churchyard
http://www.its-behind-you.com/grimaldi.html. It would be nice to think
of Grimaldi Park as being Grimmauld Place, but if it were, surely
Harry and Mr Weasley would have used nearby King’s Cross station in
OP7, not a “miserable little” one further away (and uphill). [fn1]
South-east of King’s Cross is Farringdon, on the Circle Line, and
nearby is Chancery Lane, on the Central Line. These are both much too
central: Chancery Lane in particular is in the centre of “Lawyers
London” (Chancery is one of the divisions of the High Court). This
seems to be an unlikely area to find Grimmauld Place. I have already
explained why the Circle Line’s absence of escalators at its stations
makes that line unlikely, whilst if you travel four or more stops away
from Chancery Lane you are heading away from the centre of London, and
also rapidly run out of stations with escalators—many Central Line
stations still use lifts.
To the south of King’s Cross we have Holborn and Tottenham Court Road.
Again, these are large stations, and are very central, so that
travelling four or more stops from either of these would take you away
from the centre of London.
Aldwych is an interesting possibility—definitely run down in the mid
1990s, and with a peak-hour-only service it could not have been used
to go to King’s Cross for 11am. Against it though, we find that it was
extremely central, it was one end of a shuttle service to Holborn, so
they would have to change there (people who count stops on the first
leg of a tube journey on which they have to change trains, only count
to the interchange station) and it closed in May 1994. This would put
the dates in the canon out by at least two years since the date of
Nearly Headless Nick’s Deathday in CS8 gives the events in the early
part ofOrder of the Phoenix as having taken place in August 1995.
A little closer to King’s Cross lies Bloomsbury, served by Russell
Square station, with Goodge Street a little further west. These are
both quite small stations, near the edge of the central area, and
travelling four stops south would take you to Piccadilly Circus or
Embankment respectively, which are both very central. Goodge Street is
of particular interest because the journey from Goodge Street to
King’s Cross would involve a change of trains, so it may be easier to
walk rather than take the underground.
We now come to a collection of stations, on various lines, strung out
close together along the Euston Road to the south west of King’s
Cross. Great Portland Street and Euston Square are on the Circle Line,
and the same considerations as at Farringdon would seem to rule them
out. Euston is a big Underground station—it serves a main line station
bigger than King’s Cross. Warren Street is a possibility—it is four
stops from Charing Cross, the official centre of London, from which
distances are measured, and at the end of Whitehall, where most
Government Ministries are located—perhaps including the Ministry of
Magic. However, Warren Street is on a direct line to King’s Cross—if
Grimmauld Place was near Warren Street, why did the party not use it
to travel to King’s Cross on September 1st?
West of King’s Cross lies Mornington Crescent, famous from the BBC
radio comedy show I’m Sorry I Haven’t a Clue—the game Mornington
Crescent has only one rule, which is that the players take turns to
name a Tube station, and the first one to say “Mornington Crescent” is
the winner! The station is small, not on a direct line to King’s
Cross, and four stops would take you to Tottenham Court Road, five to
Leicester Square and six to Charing Cross, all of which are very
central. This would be a most promising candidate except for the
unfortunate circumstance that it was mothballed from 1992 to 1998,
neatly bracketing the events in the early part of Order of the
Phoenix, for which the canonical date is 1995, as I have already
About twenty minutes walk north of King’s Cross lies York Way station.
This is definitely very run down, and would fit the bill almost
perfectly except for the fact that it closed in 1932. If Harry and Mr
Weasley used this station, we have to resolve a very large number of
anomalies: Harry would have had to be born no later than 1917. Frank
Bryce could have been injured in the Crimean War (or maybe the
American Civil War), but the Ford Anglia appearing in Chamber of
Secrets would have had to be fitted with a “flux capacitor” like the
DeLorean in Back to the Future (or perhaps a Time-Turner) as no Ford
was badged as an Anglia until 1940! I think we’d better carry on
There remain Camden Town, to the north west of King’s Cross,
Caledonian Road, to the north (just off the attached map), and
Highbury & Islington to the northeast. As these are all rather further
than a mile from King’s Cross, Grimmauld Place would have to be some
distance to the south of them to be only a twenty-minute walk from
King’s Cross. This actually supports them as possibilities, as it
would explain why they were not used for the journey to King’s Cross.
(Another possible explanation is that Camden Town is “exit only” on
Sunday mornings to reduce the crowds visiting Camden Market, so it
could not have been used to travel to King’s Cross to catch the
Hogwarts Express at 11am on the day before term started—Hogwarts terms
always seem to start on Mondays. A ) At the canonical date of 1995
the area had some seedy parts, although it has been largely
“gentrified” in the subsequent ten years, and a large area was swept
away for the construction of the new railway line connecting St.
Pancras station to the Channel Tunnel. To see what it used to be like,
watch the 1950s Ealing comedy The Ladykillers, much of which was
filmed on location in this area.
Five stops from Highbury & Islington takes you to Green Park station:
on the other side of the eponymous park lies Whitehall, the Muggle
seat of government. Could this also be where the Ministry of Magic is
to be found? It’s possible, although the walk to the Ministry of Magic
is said to be through the streets rather than a park.
More promisingly, five stops from either Caledonian Road (on the
Piccadilly Line) or Camden Town (on the Northern Line), takes you to
the intersection of those two lines at Leicester Square station, which
is on the Charing Cross Road, where the Leaky Cauldron is to be found
(see Harry Potter and the Philosopher’s Stone). Although distance is
no object to wizards who can Apparate, it would make some kind of
sense for the wizards’ pub to be near the Ministry of Magic. One more
stop down the Northern Line takes you to Charing Cross itself, at the
northern end of Whitehall.
Grimmauld Place was therefore probably about three quarters of a mile
from King’s Cross, somewhere to the north of it, and closer to either
Camden Town or Caledonian Road station than it is to King’s Cross.
Consequently, the Ministry of Magic is probably near Leicester Square
or Charing Cross stations, close to both the Leaky Cauldron and to the
Muggle government ministries.
A - An alternative explanation as to why the day after the arrival at Hogwarts (2nd September) always seems to be a Monday is that Hogwarts may choose to operate a normal Monday timetable on the first day of term, regardless of what day of the week it actually is — just as my local railway company operates a Sunday service on Good Friday, and a church may have its usual Sunday services on festivals like Christmas and Ascension Day. Similar tinkering with the school calendar would help to explain a lot of date anomalies in the books, such as why there were lessons on Valentines Day 1993 (which was a Sunday), or even how there could be two Mondays in a row.2
From the available evidence, it would seem that Grimmauld Place would fall somewhere on this map:
Final Note : The HP Wikia is a really bad source of information, I have learned this the hard way while trying to back up my memory of events.