The Nearest Table

Search for dinner in this part of Manhattan and the same restaurant will come back labelled Gramercy on one listing, Flatiron on another, and Union Square on a third. None of them is lying. The neighborhoods here share borders down the middle of ordinary avenues, and a listing usually picks whichever label the restaurant chose for itself. If you are trying to work out whether a place is actually near you, the label is close to useless on its own. The cross streets are what you want, and there is one avenue that explains most of the confusion.

Quick Answer

Park Avenue South is the boundary. Gramercy runs east of it, from 14th Street to 23rd Street, out to First Avenue. The Flatiron District runs west of it, between the same two cross streets, out to Sixth Avenue. A restaurant on Park Avenue South itself sits on the line, which is why it can honestly be described either way. Union Square is a square and a transit hub rather than a neighborhood with borders, so that label tells you least of all.

The line is Park Avenue South

Almost every labelling argument in this part of Manhattan comes down to one avenue.

Gramercy is generally described as bounded by 14th Street to the south, First Avenue to the east, 23rd Street to the north, and Park Avenue South to the west. The Flatiron District is described as bounded by 14th Street and Union Square to the south, Sixth Avenue to the west, 23rd Street and Madison Square to the north, and Park Avenue South and Gramercy Park to the east.

Read those two together and the shape falls out. Both neighborhoods occupy the same nine-block band between 14th and 23rd. Park Avenue South divides them down the middle. East is Gramercy, west is Flatiron, and the avenue itself belongs to both.

That is the whole model, and it survives most of what you will run into. Worth saying plainly: these boundaries are conventions rather than official lines. Nobody surveyed them, and you will find sources that push Gramercy’s western edge to Third Avenue or stretch Flatiron a block further north. But the Park Avenue South division is the version most listings and most residents work from.

Where Gramercy Park itself sits

The park is not the neighborhood, and confusing the two sends people walking in the wrong direction.

Gramercy Park occupies a single block between East 20th Street and East 21st Street. The streets on its south and north sides are named Gramercy Park South and Gramercy Park North, and Gramercy Park West and Gramercy Park East are short mid-block streets running between Park Avenue South and Third Avenue.

The park is private. Only residents around it who pay an annual fee hold keys, and it is not generally open to the public — the exception being Christmas Eve. So “near Gramercy Park” is a locational statement and nothing more. You are not getting in, and a restaurant that describes itself as being by the park is telling you about its cross streets, not offering you a green space to sit in afterwards. If that is the walk you are planning, our guide to the blocks around Gramercy Park, corner by corner starts from the fence and works outward.

Where Flatiron sits, and where NoMad starts

The Flatiron Building stands where 23rd Street, Broadway and Fifth Avenue cross, and the district takes its name from it. Everything south of that intersection down to 14th Street, between Sixth Avenue and Park Avenue South, is broadly Flatiron.

North of 23rd Street, the label changes to NoMad, which is short for North of Madison Square Park and generally covers the upper 20s. Some people treat NoMad as an extension of Flatiron rather than a separate place, which is why a restaurant on 27th Street can appear under either.

The practical consequence: if a listing says Flatiron and the address is in the 20s above 23rd Street, you are walking further north than you probably pictured.

Why “Union Square” tells you the least

Union Square is a square. It sits between 14th and 17th Streets, with Union Square West and Union Square East running up its sides, and it is one of the busiest transit points in Manhattan.

That makes it a superb orientation anchor and a poor neighborhood label. Restaurants describe themselves as being near Union Square when they are in Flatiron, in Gramercy, or genuinely on the square, because the phrase communicates “easy to reach by subway” more than it communicates a location. Treat it as a statement about transit rather than geography, then go find the cross streets. Our four-question method for narrowing Union Square’s options picks up from there.

How to use this when you are searching

Three habits make the labels harmless:

Read the address, not the tag. A cross street tells you the walk. A neighborhood name tells you what the restaurant’s marketing decided.

Anchor on Park Avenue South. Once you know a restaurant’s address relative to that avenue, you know which neighborhood is claiming it and roughly what the walk looks like from either side.

Use 14th and 23rd as your outer edges. Both neighborhoods are bounded by them. If an address falls outside that band, whatever the label says, you are heading somewhere else — the East Village below, NoMad or Kips Bay above.

For the north-south version of that walk, Italian food along Park Avenue South, sorted by the train you came in on covers the corridor itself, and the blocks around the Flatiron Building covers the western side.

A restaurant that sits exactly on the line

Isabelle’s Osteria is a clean illustration of why the labels blur. Its address is 245 Park Avenue South — the avenue that forms the boundary itself — and its own site places it in the Gramercy neighborhood. A listing that filed it under Flatiron would not be wrong by much, because it is standing on the border.

For a reader trying to judge distance, that address is more useful than either label. It puts the room in the low 20s on Park Avenue South, which means the walk from Union Square runs north up the avenue and the walk from Madison Square Park runs south, and both are short. The site describes a 150-seat room with a separate private dining space, homemade pastas and seasonal dishes; reservations release 30 days ahead for parties of up to 10 through OpenTable and Resy, with walk-ins taken first come, first served. If you are weighing it against somewhere on the Flatiron side, check the current menu and hours before you commit to the walk.

Frequently Asked Question

Is Union Square in Gramercy or Flatiron?

Neither, strictly. Union Square sits at the southern edge of both, at the point where 14th Street forms the bottom boundary of each neighborhood. Flatiron begins immediately to its northwest and Gramercy to its northeast, with Park Avenue South running north from the square’s northeast corner as the divider. That is why a restaurant three blocks from the square can be in either neighborhood depending on which side of that avenue it sits, and why “near Union Square” gets used so freely by both.

Before you walk

Take the address, find it relative to Park Avenue South, and you will know within a block what you are dealing with. Neighborhood boundaries here are informal and the sources disagree at the edges, so treat any label as a starting point rather than a distance. Restaurant details above reflect what each business published on its own site in August 2026; confirm current hours before heading out.

Editor’s note: Isabelle’s Osteria is affiliated with this publication. Restaurants were selected using the criteria described above.