Below is a list of some of the top web design companies in Las Vegas based on their reputation and experience:

1. Adlava
2. NeONBRAND
3. Las Vegas Web Design Co.
4. 702 Pros: Web Design
5. Platinum Web Marketing
6. Michael Pothos Design
7. WebSource Media
8. Vegas SEO Guru
9. All in Web Pro
10. The Web Squad

It is important to note that each of these companies may specialize in different areas of web design, such as e-commerce, responsive design, or custom development. It is recommended that individuals seeking web design services do their own research and due diligence to find a company that best suits their needs.