For individuals in uniformed services (such as the military, law enforcement, or postal services), policies regarding gender identity and expression have evolved significantly and often vary by agency or current administration.

: As of 2025/2026, policies regarding transgender personnel have fluctuated. In some recent periods, individuals with gender dysphoria were barred from enlisting or required to serve under the standards associated with their biological sex.

Current and past policies for transgender service members in the United States include: