Kalamata Olive Oil: The Place, the Olive, and What's in the Bottle
Kalamata olive oil is the most confusing name in the olive aisle, and the confusion is worth untangling before you buy anything. Kalamata is world-famous as a table olive — the big, glossy, purple-black fruit in the deli tub. But the Kalamon variety that produces those olives is not the variety that produces most oil sold under the Kalamata name. "Kalamata" on an oil bottle is a place, not a cultivar: a protected designation covering Messinia in the southwest Peloponnese, whose oil is made overwhelmingly from Koroneiki. This is the third of our cultivar guides — what Kalamata actually refers to, where it grows, what the oil is like, and how to buy it well.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- Kalamata is a city, a region and an olive — and the oil borrows the first of those. Kalamata is the capital of Messinia in the southwest Peloponnese, and the olive oil designation named after it is a place-based protected designation of origin.
- PDO Kalamata olive oil is made mainly from Koroneiki, with only a small permitted proportion — commonly cited as up to 5% — of the Mastoidis variety. The Kalamon table olive is not part of the oil specification.
- The table olive has its own separate designation. "Elia Kalamatas" was registered as a protected designation of origin on 21 June 1996 under Commission Regulation (EC) No 1107/96, and covers the cured Kalamon fruit rather than any oil.
- Kalamon fruit is not short of oil — it is worth more whole. One comparative study reported Kalamon among the highest for oil content on a dry-matter basis, at around 48%. A large, prized table olive simply earns more in a jar than in a mill.
- Koroneiki is why the region's oil is good. It accounts for the great majority of Messinian production, and it is an intensely fruity, peppery and unusually stable oil.
- The name is contested, and that matters to shoppers. "Kalamata" has long been used generically outside Greece to mean any dark almond-shaped brine-cured olive, which is exactly the dispute the PDO exists to settle.
- Sidr & Stone's own oil is not a Greek oil at all — it is a single-estate, rain-fed, organically grown Moroccan extra virgin olive oil, cold-pressed within hours of harvest and bottled unfiltered from one family grove outside Marrakech.
What Kalamata Actually Is
Three separate things carry the name, and almost all of the confusion comes from collapsing them together.
Kalamata the city is the capital and largest town of Messinia, on the Gulf of Messinia in the southwest Peloponnese. Kalamon — usually anglicised to Kalamata — is the olive cultivar the region is famous for: a large fruit, black to dark purple when ripe, distinctly almond-shaped, with a firm, meaty flesh. Under the Elia Kalamatas designation the fruit has to average around 6 grams, is picked by hand once fully ripe and completely black, and is cured rather than crushed. PDO Kalamata, on an oil bottle, is a third thing again: a designation covering extra virgin olive oil produced in Messinia.
So a jar labelled Kalamata olives and a bottle labelled Kalamata olive oil are not two forms of the same fruit. They share a place name, and very little else.
| Kalamata at a glance | |
|---|---|
| Also known as | Kalamon (the cultivar); Kalamata (anglicised) |
| Origin | Messinia, southwest Peloponnese, Greece |
| Primary use of the Kalamon cultivar | Table olive, brine or vinegar cured |
| Fruit | Large, almond-shaped, black to deep purple when ripe |
| PDO for the fruit | Elia Kalamatas, registered 21 June 1996 |
| PDO for the oil | Kalamata — extra virgin olive oil from Messinia |
| Main variety in the PDO oil | Koroneiki, with a small permitted share of Mastoidis |
| Oil style | Fruity, green, peppery; medium to robust |
Where It Grows: Messinia and the PDO Kalamata Zone
Messinia occupies the southwestern corner of the Peloponnese, running from the mountains inland down to a long, sheltered coast. It is one of the most important olive regions in Greece and among the most concentrated in the Mediterranean.
The variety that dominates it is Koroneiki, named after the coastal town of Koroni in the same province. Koroneiki accounts for the overwhelming majority of Messinian olive production and a large share of Greek olive oil generally — which is why an oil carrying the Kalamata designation is, in practice, a Messinian Koroneiki. Our guide to Koroneiki olive oil covers the variety in full.
The Kalamon trees grow in the same landscape, often on the same farms, and are harvested for the table. Two crops, two purposes, one region, one name doing double duty on the shelf.
The Agronomy: A Table Olive First, an Oil Olive Second
The obvious question is why a famous olive is not used to make the oil that carries its name. The answer is economic rather than agronomic, and it is worth stating plainly because the usual explanation — that Kalamon simply lacks oil — is not true.
One comparative study of olive varieties reported Kalamon with the highest oil content on a dry-matter basis of those examined, at around 48%. The fruit is oily. What decides its fate is that it is also large, firm and beautiful, and a fruit like that is worth considerably more sold whole than crushed. A grower with a Kalamon tree harvests it by hand at full ripeness for the table; a grower with a Koroneiki tree, whose fruit is tiny and unremarkable to look at, sends it to the mill.
Monovarietal Kalamon oil does exist — a handful of Greek producers make it — but it is a specialist product rather than what the phrase "Kalamata olive oil" usually delivers.
What the Oil Tastes Like
Because a PDO Kalamata oil is essentially a Messinian Koroneiki, it tastes like one. Expect a green, aromatic oil — fresh-cut grass and green herbs on the nose, sometimes green tomato or artichoke, with a clean bitterness across the tongue and a peppery catch at the back of the throat.
It sits in the medium-to-robust band rather than the aggressive end. Compared with a Jaén Picual it is more aromatic and less brutally bitter; compared with a mild Arbequina it is a much more assertive oil. Harvest timing moves it as it moves every cultivar: picked early and green it is intense and high in phenolics, picked later it is rounder, softer and lower in them.
If a bottle labelled Kalamata tastes flat, sweet and characterless, the likely explanations are age or poor handling rather than the variety.
The Composition: Oleic Acid and Stability
Koroneiki's technical reputation rests on the same two measures that decide most oils. Its fatty-acid profile is strongly monounsaturated, dominated by oleic acid, which is the fraction least prone to oxidation. And it is typically high in phenolic compounds when harvested early and milled promptly, which is what gives the oil both its bitterness and its keeping quality.
The Kalamon fruit itself is reported at roughly 73% monounsaturated fat, with around 12% polyunsaturated and 15% saturated — a profile broadly in line with other olive varieties, which is another reason the "it has no oil" explanation does not hold.
For what the phenolic figures mean and how they are measured, see our guide to olive oil polyphenols.
| Cultivar | Main region | Primary use | Character as oil |
|---|---|---|---|
| Kalamon | Messinia, Greece | Table olive | Rarely milled; monovarietal oil is a specialist product |
| Koroneiki | Messinia and Crete, Greece | Oil | Intensely fruity, green, peppery; very stable |
| Mastoidis | Southern Greece | Oil and table | Green, herbaceous; a minor partner in the Kalamata PDO |
| Picual | Jaén, Spain | Oil | Green, markedly bitter and peppery; very stable |
| Arbequina | Catalonia and widely planted | Oil | Mild, buttery, apple and almond |
Kalamata Olive Oil in the Kitchen
A good Messinian oil is a finishing oil first. It is at its best raw, where the aroma survives: over tomatoes, on white cheese, through pulses and bean dishes, across grilled vegetables, or simply on bread with a little salt and oregano.
It also cooks well. The high oleic content and phenolic load give it real oxidative stability, so roasting, sauteing and shallow frying are all reasonable uses — though there is an argument that anything you paid a designation premium for is wasted in a hot pan.
Where it is a poor match is anywhere a neutral oil is wanted: plain sponges, delicate mayonnaise, or dishes with subtle flavours a peppery oil would trample.
How to Buy Kalamata Olive Oil Well
Because the word on the front is a place rather than a variety, the useful information is all on the back. Five checks do most of the work.
- Look for the PDO mark, not just the word. "Kalamata" alone on a label is a name; PDO Kalamata is a registered designation with a specification behind it.
- Find the variety. A good bottle will say Koroneiki. If it says Kalamon, you have found the unusual monovarietal, which is a different and interesting oil.
- Find a harvest date. A designation guarantees origin and process, not freshness. An undated bottle tells you nothing about how much of the aroma survives.
- Prefer early harvest if you want the intensity, and expect a milder, rounder oil if the fruit was picked late.
- Buy dark glass or a tin, in a size you will finish within a few months of opening.
A single-estate oil from a named Messinian grower tells you more than a regional blend carrying the same designation. For a fuller walkthrough of the quality signals on any bottle, see our guide to choosing a quality olive oil.
| What to look for | Why it matters | Where to find it |
|---|---|---|
| PDO Kalamata mark | Ties the oil to Messinia and a specification | Front label |
| Named variety | Tells you it is Koroneiki, or the rarer Kalamon | Front or back label |
| Harvest date | The designation says nothing about age | Back label or neck |
| Named estate or mill | Traceability behind the regional claim | Label and producer's site |
| Polyphenol figure | Separates a serious oil from an ordinary one | Producer's site or lab report |
| Dark glass or tin | Protects the oil once you are using it | The packaging itself |
The Honest Case Against "Kalamata Olive Oil"
Three objections deserve a straight answer.
The first is that the name does work the contents do not support. A shopper who buys Kalamata olive oil expecting the flavour of the olive in the deli tub will not get it, and no part of the label warns them. That is not fraud — the designation is honestly a place — but it is a genuine mismatch between what the word suggests and what it means.
The second is that the name is contested. "Kalamata" has been used for decades outside Greece as a generic description of any dark, almond-shaped, brine-cured olive, and the question of whether it is a protected place name or a common product type has been argued at length in Greek and European forums. A shopper is entitled to find that unsatisfying.
The third is the general limitation of any designation. A PDO tells you where an oil came from and how it was made. It does not tell you that this particular bottle was pressed recently, stored in the dark, or made by a careful producer. Origin marks are a floor, not a verdict — the same point our guide to Picual and its Jaén denominations makes about Spain.
Why Sidr & Stone
Our own oil is not Greek, and we are not going to pretend to a Messinian heritage we do not have. The reason we write cultivar guides is that variety, origin, harvest date and grade are the four things a label can genuinely tell you — and Kalamata is the clearest illustration on the shelf of how easily one of those four can be mistaken for another.
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco, with no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives them.
- Organically grown — no synthetic fertilisers, pesticides, or herbicides.
- Single harvest — a small, limited batch; once the season's pressing is gone, it is gone until next year.
- Cold-pressed within hours of harvest — to preserve flavour, aroma, and polyphenols.
- Unfiltered extra virgin — minimally processed, and it may show a little natural sediment, which is normal for an honest unfiltered oil.
- 100% natural — a single ingredient, with nothing added.
- 500 ml dark glass with a gold label — protective packaging in a size built to be finished fresh.
- Halal certified, with 10% of profits to charity — a commitment that applies to every Sidr & Stone product.
- Fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is better than a good PDO Kalamata — a fresh early-harvest Messinian Koroneiki from a named grower is an excellent oil and we would happily keep one in the kitchen. What we will say is that ours is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest, and that it is a different style rather than a competing one.
Frequently Asked Questions
What is Kalamata olive oil?
It is extra virgin olive oil from Messinia in the southwest Peloponnese, sold under a place-based protected designation named after the city of Kalamata. In practice it is made mainly from the Koroneiki variety rather than the Kalamon table olive.
Is Kalamata olive oil made from Kalamata olives?
Usually not. The PDO Kalamata olive oil specification is built on Koroneiki, with only a small permitted proportion of Mastoidis. Kalamon, the famous Kalamata table olive, is grown to be cured and eaten whole.
What does PDO Kalamata mean?
It is a protected designation of origin covering olive oil produced in the Messinia region to a defined specification. It guarantees where the oil came from and how it was made — not that any particular bottle is fresh or exceptional.
Is Kalamata olive oil the same as Koroneiki olive oil?
Very nearly. A PDO Kalamata oil is a Messinian Koroneiki in almost every case. The difference is that "Koroneiki" names the variety and "Kalamata" names the place, and Koroneiki is also grown widely outside Messinia, particularly on Crete.
Can you make olive oil from Kalamon olives?
Yes, and a few Greek producers do. Kalamon is not short of oil — one comparative study reported it among the highest for oil content on a dry-matter basis. It is simply worth more sold whole as a table olive than crushed at the mill.
Is Kalamata olive oil good for cooking?
Yes. Its high oleic acid content and phenolic load give it good oxidative stability, so it holds up to roasting and shallow frying. It is best used raw, though, where the aroma and pepper actually reach the plate.
How does Kalamata olive oil compare with Sidr & Stone?
They are different styles. A PDO Kalamata is a Greek regional oil, usually Koroneiki, made to a designation specification. Sidr & Stone is a single-estate, rain-fed, organically grown Moroccan extra virgin, cold-pressed within hours of harvest and bottled unfiltered in one small batch a year.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
Kalamata is the best example on the shelf of a lesson worth carrying to every other bottle: a famous word on a label can be a place, a variety, a grade or a marketing flourish, and until you know which one it is you do not know what you have bought. Here it is a place — and a good one, because Messinia makes genuinely fine oil — but the olive most buyers picture is not in the bottle.
What that means in practice is straightforward. If you want the Kalamata region's oil, look for the PDO mark, the Koroneiki name and a harvest date, and buy from a grower who prints all three. If you specifically want the flavour of the Kalamon fruit, buy the olives; the oil is a different product.
Our own oil comes from a different tradition entirely, and knowing the difference is rather the point. Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed, organically grown, and cold-pressed within hours of harvest — is available to pre-order, with fulfilment in the UK, EU, and US. First harvest, estimated shipping from November 2026.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article describes the Kalamata and Kalamon designations, the varieties used in Messinian olive oil, and typical composition and sensory character at the time of writing; designation specifications, published figures and production practice vary by season and source, and readers should check current sources. Comparisons with other cultivars are made in good faith and in fair terms. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.