HI, We have tickets that were purchased last year before the pandemic at Costco. I read online that only 3 family household members are allowed to go to Universal Studios. There are 6 of us. Is this correct only 3 of us can go in?

I went with a group of 10 (my kids, nephews, and nieces). You guys are good to go.

Probably best to check with Universal directly, but the website notes party size maximum is 10 people from no more than 3 households... See here: https://www.universalstudioshollywood.com/web/en/us/faqs

You can all go! I always go with a party of 6.

I came today and we are a party of 9.

I've never heard that

You can all go. I'm here now. Just make sure you make a reservation before to save time. There is a limit on how many can enter the park

I believe, and don't hold me to this, the limit of 3 is for person's buying new tickets. If you already have existing tickets/passes they will honor them.