This bill, titled the "Securing Smart Investments in our Ports Act," amends federal law to ensure a more balanced allocation of funding for port infrastructure projects. It specifically modifies Section 54301 of title 46, United States Code, which governs the Port Infrastructure Development Program. The legislation introduces a new requirement that mandates equitable geographic distribution among regions of the United States when selecting projects. This criterion applies to both the general Port and Intermodal Improvement Program and the specific assistance provided for small inland river and coastal ports and terminals. The bill's objective is to promote a wider and fairer spread of federal investments for critical port improvements across the nation, preventing undue concentration in particular areas.