Where to find the Costco login page
The Costco login portal is at costco.com. Look for the "Sign In" link in the top right corner of the homepage. Clicking it takes you to a page where you enter your email address and password. You do not need to go through a separate portal — the main website is where members log in.
If you are on a mobile device, the same "Sign In" link appears in the menu (usually a hamburger icon or three horizontal lines). The login process is identical on phone and desktop.
Key Takeaways
- The Costco login is on costco.com in the top right corner, not a separate website or app portal.
- You need your email address and the password you created when you set up your account, or you can reset it if you forget.
- If you do not have a Costco.com account yet, you can create one using your membership number and email address.
- Two-factor authentication is optional but adds security by requiring a code sent to your phone or email each time you log in from a new device.
What you need to log in
You will need two pieces of information: the email address associated with your Costco account and your password. If you do not remember your password, the login page has a "Forgot password?" link that lets you reset it by email.
Your Costco membership number is not required to log in online — only your email and password. However, you will need your membership number handy if you are placing an order, because Costco uses it to confirm your membership status and delivery address.
Creating a Costco.com account if you do not have one
If you have a Costco membership but have never logged into costco.com, you need to create an account first. On the sign-in page, look for a link that says "Create an account" or "New member?" Click it and enter your email address, membership number, and the password you want to use.
Costco will send a confirmation email to the address you provided. Open that email and click the confirmation link to complete setup. After that, you can log in using your email and password on any device.
Resetting a forgotten password
On the Costco login page, click "Forgot password?" Enter the email address associated with your account. Costco sends a password reset link to that email — check your inbox and spam folder if you do not see it right away.
Click the link in the email and create a new password. The link usually works for 24 hours. If it expires, go back to the login page and request a new reset link. Once you have set a new password, you can log in when ready.
Setting up two-factor authentication for added security
After you log in, you can turn on two-factor authentication in your account settings. This means that when you log in from a device Costco has not seen before, you will receive a code by text message or email. You enter that code to complete the login.
To enable it, go to your account settings (usually under "My Account" or a profile icon), find the security section, and select "Add two-factor authentication." Choose whether you want codes sent to your phone or email, and follow the prompts. You can turn it off anytime if you prefer not to use it.
Troubleshooting common login problems
If you see an error message saying your email or password is incorrect, double-check that you are using the right email address — the one you registered with, not your membership number. Passwords are case-sensitive, so make sure Caps Lock is off. If you still cannot log in, use the "Forgot password?" link to reset it.
If you see a message that your account is locked or suspended, it usually means Costco detected unusual activity. Contact Costco member services by phone or through the website to unlock it. They will ask you to verify your identity and membership. If you are trying to log in from a different country or on a VPN, Costco may block the attempt for security reasons — try logging in from your normal location or device.
What you can do after you log in
Once logged in, you can view your membership status, place orders for delivery or pickup, track orders, manage your payment methods, and view your purchase history. You can also add household members to your account so they can place orders under the same membership.
If you have a Costco credit card, you can view your card balance and statements through your account as well, though you may need to log into a separate portal for detailed credit card management depending on which bank issues your card.
Frequently Asked Questions
Do I need a Costco membership to create an online account?
Yes. You must have an active Costco membership to create a costco.com account. You will need your membership number during setup. If your membership has expired, you will need to renew it before you can log in online.
Can I use my phone number instead of my email to log in?
No. Costco requires an email address for login. If you want to change the email on your account, log in, go to account settings, and update it there. You will need to confirm the new email address before the change takes effect.
What if I forgot my email address?
Contact Costco member services with your membership number and they can tell you which email is on file. You can then use that email to log in or reset your password. Member services is reachable by phone or through the Costco website.
Is the Costco app a different login than the website?
No. The Costco mobile app uses the same email and password as costco.com. Log in once on the app and you stay logged in. If you change your password on the website, use the new password the next time you log into the app.
Can someone else log into my account with my email and password?
Yes, which is why keeping your password private matters. If you think someone else has accessed your account, change your password when ready using the "Forgot password?" link. You can also enable two-factor authentication so that even if someone has your password, they cannot log in without the code sent to your phone or email.