Yes, olives are briny—that’s their job. They can be high in salt, so if you’re watching your blood pressure, don’t eat a whole jar in one sitting (we’ve all been there). Rinsing them under cold water can cut the sodium by a surprising amount without killing the flavor.
Or, look for “low-sodium” versions, which are starting to show up in stores. Balance is your friend—enjoy a handful, not a mountain.