Are Marjoram and Oregano in the same botanical family?

Yes — both belong to Lamiaceae.

Can you substitute Marjoram for Oregano?

They are close relatives in the genus Origanum, often substitutable with flavor adjustments.

Compare · per-herb profile

Marjoram vs Oregano

Origanum majorana · Origanum vulgare

Marjoram

Origanum majorana

D No Clinical Evidence

Family: Lamiaceae
Genus: Origanum
Primary use: culinary

Marjoram is a cold-sensitive perennial herb or undershrub with sweet pine and citrus flavours. In some Middle Eastern countries, marjoram is synonymous with oregano, and there the names sweet marjoram and knotted marjoram are used to distinguish it from other plants of the genus …

Oregano

Origanum vulgare

D No Clinical Evidence

Family: Lamiaceae
Genus: Origanum
Primary use: culinary

Oregano is a species of flowering plant in the mint family, Lamiaceae. It was native to the Mediterranean region, but widely naturalised elsewhere in the temperate Northern Hemisphere.

At a glance

· Same genus (Origanum) — close relatives, often substitutable.
· Both are primarily culinary.
· Evidence tiers — Marjoram: D; Oregano: D.