No, you cannot trademark a uniform.
You cannot trademark a uniform. The distinctiveness of a uniform is typically in its shape and design, which are aspects that cannot be trademarked. It might be possible to patent the specific design features of the uniform, but that can be a difficult undertaking. You can trademark any logos or slogans associated with your company and then place them on the uniform, but that will only protect the trademarked aspects, not the whole of the uniform.
If you have a logo that uses the uniform as a central aspect, you could trademark that logo, provided that it is distinct and original enough to warrant that protection. This logo would have to serve as a central part of identifying your company to consumers in order to qualify for the protection of a trademark.
Contact our associates today if you have any other questions regarding what aspects of a uniform you can or cannot trademark.