What is Star-K?
Also spelled / known as: Star K Kosher, Star-K certification, Baltimore kosher
In brief
Star-K Kosher Certification is a major international kosher agency based in Baltimore, Maryland, known for rigorous standards, extensive rabbinic supervision, and pioneering work on Shabbat-compliant appliances.
Star-K explained
Star-K Kosher Certification was established in Baltimore and is one of the 'Big Four' kosher certifying agencies. The Star-K symbol — a five-pointed star with a K inside — appears on tens of thousands of products and services worldwide. Star-K is particularly respected for its technical expertise in industrial kosher supervision and for certifying appliances as Shabbat-compliant.
Real-world examples
A five-pointed star with the letter 'K' inside on product packaging
Many Baltimore kosher restaurants operate under Star-K supervision
Star-K certifies Shabbat mode settings on ovens, dishwashers, and refrigerators
Widely used by international food manufacturers
Context & nuance
Star-K is headquartered in Baltimore, Maryland, and led for many years by Rabbi Moshe Heinemann. It is particularly known for its engineering-minded approach to kosher supervision and has been a pioneer in certifying modern appliances for Shabbat and Yom Tov use. In Baltimore's Pikesville and Park Heights neighborhoods, nearly every kosher establishment carries Star-K supervision.
Frequently asked questions
- Where is Star-K based?
- Star-K Kosher Certification is headquartered in Baltimore, Maryland. The agency supervises the majority of kosher establishments in the Baltimore Jewish community and certifies products and services worldwide.
- Is Star-K accepted by all Orthodox Jews?
- Yes. Star-K is one of the 'Big Four' kosher certifying agencies and is universally accepted in Orthodox Jewish communities alongside OU, OK, and Kof-K.
- What is Star-K known for besides food?
- Star-K is renowned for its work certifying appliances — especially ovens, refrigerators, and dishwashers — as compliant with Shabbat and Yom Tov use. The Star-K website lists hundreds of 'Shabbat Mode' appliances.
Cities where Star-K matters most
Find verified kosher listings in these communities where star-k is especially relevant.
Where Star-K shows up
These business categories are where you'll encounter star-k most often.
Related terms
Hechsher
A hechsher is the symbol printed on a kosher product or displayed by a kosher establishment indicating which rabbinic agency has certified it as meeting kosher standards.
OU Kosher
OU Kosher is the certification from the Orthodox Union — the largest kosher certifying agency in the world, supervising over 1,000,000 products from 10,000+ companies in 100+ countries.
OK Kosher
OK Kosher Certification is one of the 'Big Four' kosher certifying agencies in the United States, founded in 1935 and known for its global reach across 100+ countries.
Kof-K
Kof-K Kosher Supervision is one of the 'Big Four' US kosher certifying agencies, based in Teaneck, New Jersey, and known for its global reach and rigorous standards.
Mashgiach
A mashgiach is a trained kosher supervisor who ensures that a restaurant, bakery, factory, or catering operation maintains kosher standards — checking ingredients, overseeing food preparation, and verifying every step of the process.
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