Demographics of Gilmore, ID
Affluence Level in Gilmore, ID
A middle-class area roughly in line with national averages across income, home values, education, and employment.
People of Gilmore, ID
The people of Gilmore, Idaho, today number roughly 3,000, forming a tight-knit, predominantly white community with a distinctly rural, working-class character. The city’s population is notably homogeneous — 89.9% white and 2.9% Hispanic — with a foreign-born share of just 0.2%, reflecting a deep-rooted local population that has seen little recent international immigration. With only 22.3% of adults holding a college degree, the city’s identity is grounded in trades, agriculture, and small-town self-reliance, making it a place where families often trace their local roots back several generations.
How the city was settled and grew
Gilmore’s human history begins not with a grand land grant but with the discovery of silver and lead in the surrounding Lemhi Range in the 1880s. The original wave of settlers were hard-rock miners, many of them Cornish, Irish, and German immigrants drawn by the promise of steady work in the Gilmore Mining District. These early arrivals built the first permanent homes in what is now Old Town Gilmore, a cluster of wood-frame houses and boarding houses near the original mine shafts. By the 1910s, the railroad’s arrival spurred a second wave of American-born laborers from the Midwest and Great Plains, who established homesteads in the South Fork Flats area, farming the valley floor while supplementing income with seasonal mining work. The population peaked around 1,500 in the 1920s, then declined sharply after the mines closed in the 1930s, leaving a small core of ranchers and railroad workers. The post-war era saw little growth; the city’s remote location and lack of major industry meant that West Hill, a neighborhood of modest ranch homes built in the 1950s, housed most of the few new arrivals — primarily returning veterans and their families who took up ranching or logging.
Modern era (post-1965)
After the 1965 Hart-Cellar Act, Gilmore saw virtually no impact from new immigration waves. The foreign-born population remains negligible at 0.2%, and the city’s racial composition has changed little in six decades. The most significant demographic shift has been a slow, steady out-migration of younger adults seeking jobs in Boise or Idaho Falls, offset by a modest inflow of retirees and second-home buyers drawn to the area’s low cost of living and outdoor recreation. These newer residents have concentrated in the Pine Ridge Estates subdivision, a small development of custom homes built on former ranchland east of the city limits. Meanwhile, the Hispanic population — 2.9% — is largely composed of families who moved from southern Idaho’s agricultural regions to work in the area’s remaining cattle ranches and hay farms, settling in scattered rental properties along Main Street rather than in a distinct ethnic enclave. The Black and Asian populations remain at or near zero, reflecting the city’s persistent lack of diversity and its limited economic pull for non-white groups.
The future
Gilmore’s population is projected to remain stable or decline slightly over the next decade, as the aging resident base (median age is estimated in the mid-50s) is not being replaced by younger families. The city’s cultural identity is likely to stay overwhelmingly white and conservative, with little pressure for change from in-migration. The only potential growth area is the Lemhi River Corridor, a stretch of undeveloped land south of town where a small number of out-of-state buyers have purchased lots for vacation cabins, but these are seasonal residents who do not shift the year-round demographic profile. The Hispanic share may inch upward slowly as agricultural labor demand persists, but without a major employer or housing development, Gilmore will remain one of Idaho’s most homogeneous small towns.
For someone moving in now, Gilmore offers a stable, predictable community where neighbors know each other and change comes slowly. The trade-off is clear: a low-diversity, low-amenity environment with a shrinking tax base and limited economic opportunity, but also a safe, affordable, and deeply rooted place for those who value continuity over cosmopolitanism.
* Values derived from national, state, county, city and local statistics and may differ in a specific area. Last updated: 2026-07-23T02:26:12.000Z
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