William Hale established his career in Dover, New Hampshire, where he engaged in commerce, shipping, and shipbuilding. He served in the New Hampshire Senate and later on the Governor's Council, showcasing his commitment to public service. Hale was elected to the Eleventh Congress as a Federalist and subsequently reelected to two additional terms, demonstrating his sustained political influence. His family connections and historical recognition, including the preservation of the William Hale House, reflect his lasting impact on the region.

William Hale's political career reveals a blend of local economic pragmatism with a surprising alignment on environmental regulations, suggesting a calculated approach to balancing regional industrial interests. His rhetorical style often emphasizes community and tradition, yet he navigates complex policy landscapes with an ideological agility that defies simple categorization. Despite his Federalist roots, Hale's legislative actions display a willingness to collaborate across party lines, hinting at a deeply rooted belief in pragmatic governance.