How big is a Jersey Giant?

It's the largest purebred chicken — roosters reach 13 lb and hens 10 lb. Despite the size they're calm and gentle, though they take longer to mature (and to start laying) than smaller breeds.

Do Jersey Giants lay big eggs?

Yes — large to extra-large brown eggs, around 150–200 a year, with decent winter laying. Output is moderate because the bird invests energy in its size.

Are Jersey Giants good in cold weather?

Very. Their large body mass and dense feathering make them genuinely cold-hardy. Heat is the bigger challenge, so shade and ventilation matter in hot climates.

Jersey Giant: The Biggest Chicken Breed, and a Gentle One

The Jersey Giant lives up to its name: it’s the biggest chicken breed there is, originally developed in New Jersey as a farm bird that could rival turkey for the table. For backyard keepers, the appeal is a combination you don’t often get at this size — imposing presence with a thoroughly mild manner.

What to expect

Size and eggs: large to extra-large brown eggs (150–200/year), from a bird that can top 10–13 lb.
Temperament: calm, steady, and easy to handle — the size is all gentle giant, no aggression.
Cold-hardiness: that mass holds heat well, so Jersey Giants are comfortable through northern winters.

Things to know

Jersey Giants are slow to mature — they put energy into frame before laying, so pullets start later than light breeds, and it takes longer to reach full size. Their weight means they’re not fliers (easy to fence) but it also makes them poor brooders: a hen that does sit risks crushing eggs, so plan on an incubator for chicks. And like all heavy, well-feathered breeds, they need shade and good airflow in summer heat. For keepers who want a calm, cold-proof showpiece that still pulls its weight in the egg basket, the Jersey Giant is a standout.

Common questions

How big is a Jersey Giant?: It's the largest purebred chicken — roosters reach 13 lb and hens 10 lb. Despite the size they're calm and gentle, though they take longer to mature (and to start laying) than smaller breeds.
Do Jersey Giants lay big eggs?: Yes — large to extra-large brown eggs, around 150–200 a year, with decent winter laying. Output is moderate because the bird invests energy in its size.
Are Jersey Giants good in cold weather?: Very. Their large body mass and dense feathering make them genuinely cold-hardy. Heat is the bigger challenge, so shade and ventilation matter in hot climates.