Does costco take discover cards?

No, they accept Visa or debit card. I always pay with a chk which they convert to cash

Visa and debit cards. Cash $$$ also works. (But not for fuel)

Only their citi visa and debit cards.

I always use my Costco Citi Credit card after they dropped American Express

Nope

Only Visa or any debit card.

Only if it's a debit card

If you have a Discover debit card, yes. Not credit cards though.

Yup only visa cards

Visa cards