John Day, Jr. (died 1792), soldier and political figure in Nova Scotia
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John B. Day (1847–1925), manager of the New York Giants in 1899
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The village of Chatham had been settled in 1710 as John Day's Bridge and, in 1773 when New Jersey was an English province, adopted the name of Chatham to honor William Pitt, 1st Earl of Chatham.
In 1773, the village John Day's Bridge, a community governed by the English township of Morris since its settlement in 1710, was renamed as, Chatham, in honor of Sir William Pitt, a British prime minister and the first Earl of Chatham, who was most favorable toward the colonists of the Province of New Jersey in issues with the British government.
Grant County Regional Airport a public use airport in John Day, Oregon, United States (FAA: GCD, IATA: JDA)
KSPL-LP, a low-power radio station (98.1 FM) licensed to John Day, Oregon, United States
It flows generally west to the community of Dale on U.S. Route 395, then southwest through the city of Monument to the unincorporated community of Kimberly, where it meets the main stem of the John Day River.
Many of them traveled from the Willamette Valley and Portland to The Dalles, where they followed established routes, including Steen's, to the John Day Valley west of what became Dayville and upstream to Canyon Creek.