Mini City Tycoon Codes (September 2026)

Mini City Tycoon is a Roblox building game where you grow your own city and stack up Diamonds to speed up your progress. The developer occasionally drops codes that hand out free Diamonds, which you can put straight toward expanding your city.

Working Mini City Tycoon Codes

These codes are redeemable right now, and each one adds Diamonds to your city as soon as you enter it correctly.

Note: the secret code is written in lowercase, so type it exactly that way. Roblox code boxes are case sensitive, and a single capital letter out of place will stop the code from working.

How to redeem codes in Mini City Tycoon

Redeeming a code only takes a few taps once your city has loaded in. Here’s the exact path to follow inside the Mini City Tycoon experience.

You’ll know a code worked when your Diamond counter jumps up right away on screen. If nothing changes, double-check the spelling and capitalization, or confirm the code hasn’t expired.

Expired Mini City Tycoon codes

These codes no longer add Diamonds, so don’t waste time typing them in.

How to get more Mini City Tycoon codes

New codes for Mini City Tycoon tend to show up around game updates, so keeping an eye on the developer’s official channels is your best bet. Joining the official Discord server puts you in the same place where announcements are typically posted first. You can also follow the Aurion Games community on Roblox, since that’s the group behind the game.

Are Mini City Tycoon codes free?

Yes. Every code listed here is free to redeem and only requires an active Roblox account with the game open.

Why won’t my code work?

The most common reason is a typo, since the code box is case sensitive. The other likely reason is that the code has already expired, in which case it simply won’t register any Diamonds.

Check back on this page for fresh codes, and redeem them soon after they appear since Mini City Tycoon codes can expire without much notice.