{"id":2550,"date":"2023-04-05T14:57:52","date_gmt":"2023-04-05T14:57:52","guid":{"rendered":"https:\/\/townsvillages.com\/us\/?p=2550"},"modified":"2026-08-21T08:37:16","modified_gmt":"2026-08-21T08:37:16","slug":"elmore-county","status":"publish","type":"post","link":"https:\/\/townsvillages.com\/us\/elmore-county\/","title":{"rendered":"Elmore County, Idaho"},"content":{"rendered":"<p>Elmore County is a county in Idaho, United States, stretching from the Snake River plain north into the Sawtooth and Boise mountains. It had a population of 28,666 at the 2020 census and covers 3,101 square miles (8,030 km2) centred near 43&deg;20&prime;N 115&deg;28&prime;W.<\/p>\n<p>Mountain Home is the county seat and its postal code is 83647. The county has 2 incorporated cities, 2 census-designated places, and several unincorporated mountain communities. It sits in the Mountain time zone.<\/p>\n<h2>Towns &amp; Villages in Elmore County<\/h2>\n<p>Elmore County splits sharply between the Snake River valley towns around Mountain Home and Glenns Ferry and a scatter of small, high-elevation mining and recreation communities in the Sawtooth and Boise National Forests to the north. CDP = census-designated place (unincorporated but tracked separately by the Census Bureau); Unincorp. = unincorporated place with no formal municipal government.<\/p>\n<div class=\"tv-table-scroll\">\n<table>\n<thead>\n<tr>\n<th>Place<\/th>\n<th>Type<\/th>\n<th>Pop.<\/th>\n<th>ZIP<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Mountain Home<\/td>\n<td>City &middot; seat<\/td>\n<td>15,181<\/td>\n<td>83647<\/td>\n<\/tr>\n<tr>\n<td>Glenns Ferry<\/td>\n<td>City<\/td>\n<td>1,258<\/td>\n<td>83623<\/td>\n<\/tr>\n<tr>\n<td>Mountain Home AFB<\/td>\n<td>CDP<\/td>\n<td>4,102<\/td>\n<td>83648<\/td>\n<\/tr>\n<tr>\n<td>Hammett<\/td>\n<td>CDP<\/td>\n<td>224<\/td>\n<td>83627<\/td>\n<\/tr>\n<tr>\n<td>King Hill<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>83633<\/td>\n<\/tr>\n<tr>\n<td>Pine<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>83647<\/td>\n<\/tr>\n<tr>\n<td>Featherville<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>83647<\/td>\n<\/tr>\n<tr>\n<td>Atlanta<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>83601<\/td>\n<\/tr>\n<tr>\n<td>Dixie<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<\/tr>\n<tr>\n<td>Rocky Bar<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<\/tr>\n<tr>\n<td>Mayfield<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<\/tr>\n<tr>\n<td>Prairie<\/td>\n<td>Unincorp.<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Rocky Bar is a 19th-century gold-rush ghost town in the Boise Mountains, now a handful of seasonal cabins. Atlanta and Featherville, though tiny, remain populated recreation and mining communities rather than true ghost towns and are treated separately from Rocky Bar.<\/p>\n<h2>ZIP Codes<\/h2>\n<ul>\n<li>83647 &mdash; Mountain Home (also serves Pine and Featherville)<\/li>\n<li>83623 &mdash; Glenns Ferry<\/li>\n<li>83633 &mdash; King Hill<\/li>\n<li>83627 &mdash; Hammett<\/li>\n<li>83648 &mdash; Mountain Home Air Force Base<\/li>\n<li>83601 &mdash; Atlanta (served via a rural route from Boise County)<\/li>\n<\/ul>\n<p>Dixie, Rocky Bar, Mayfield, and Prairie are too small and remote to carry their own ZIP codes and are served by mail routes from nearby towns.<\/p>\n<h2>Geography<\/h2>\n<p>Elmore County runs from the flat, irrigated Snake River plain in the south up through sagebrush foothills into the granite peaks of the Sawtooth and Boise National Forests in the north. The Snake River forms much of the southern boundary, and the South Fork Boise River, dammed at Anderson Ranch, drains the northern high country. Elevation ranges from around 2,500 feet along the Snake River to over 9,000 feet in the Soldier Mountains.<\/p>\n<p>Elmore County borders <a href=\"https:\/\/townsvillages.com\/us\/boise-county\/\">Boise County<\/a> to the north, <a href=\"https:\/\/townsvillages.com\/us\/custer-county-idaho\/\">Custer County<\/a> to the northeast, <a href=\"https:\/\/townsvillages.com\/us\/camas-county\/\">Camas County<\/a> to the east, <a href=\"https:\/\/townsvillages.com\/us\/twin-falls-county\/\">Twin Falls County<\/a> to the southeast, <a href=\"https:\/\/townsvillages.com\/us\/gooding-county\/\">Gooding County<\/a> to the south, <a href=\"https:\/\/townsvillages.com\/us\/owyhee-county\/\">Owyhee County<\/a> to the southwest, and <a href=\"https:\/\/townsvillages.com\/us\/ada-county\/\">Ada County<\/a> to the west. Blaine County lies to the northeast beyond Camas County.<\/p>\n<h2>Demographics<\/h2>\n<p>The 2020 census counted 28,666 people in Elmore County. Mountain Home is by far the largest community, followed by the Mountain Home Air Force Base CDP and Glenns Ferry. Elmore County&#8217;s median household income runs below the Idaho median of $74,942, reflecting the county&#8217;s military and agricultural base. Population density is roughly 9 people per square mile, among the lowest in southern Idaho outside the mountain counties.<\/p>\n<h2>Economy &amp; Local Life<\/h2>\n<p>Mountain Home Air Force Base, home to the 366th Fighter Wing, is the county&#8217;s dominant employer and drives much of Mountain Home&#8217;s economy and population. Irrigated agriculture along the Snake River valley &mdash; hay, alfalfa seed, sugar beets, and dairy &mdash; supports Glenns Ferry and King Hill. In the mountains, national-forest recreation, hunting, and seasonal cabins around Featherville, Pine, and Anderson Ranch Reservoir bring summer visitors and second-home owners.<\/p>\n<h2>History<\/h2>\n<p>Elmore County was organized on February 7, 1889, taking its name from the Ida Elmore Mine, a silver-and-gold producer that operated in the Rocky Bar mining district in the 1860s. Gold strikes at Rocky Bar and Atlanta drew miners into the Boise Mountains before the county was formed. Mountain Home Air Force Base opened in 1943 as a World War II training field and has anchored the county&#8217;s economy ever since. Anderson Ranch Dam, completed in 1950 on the South Fork Boise River, was the world&#8217;s highest earthfill dam at the time.<\/p>\n<h2>Getting There<\/h2>\n<p>Interstate 84 crosses the southern part of the county through Mountain Home and Glenns Ferry, with US Highways 20, 26, and 30 also passing through. Idaho State Highways 51, 67, 78, and 167 connect the mountain communities.<\/p>\n<ul>\n<li>Boise &mdash; 45 miles west<\/li>\n<li>Twin Falls &mdash; 65 miles southeast<\/li>\n<li>Idaho City &mdash; 40 miles north<\/li>\n<li>Fairfield &mdash; 40 miles northeast<\/li>\n<\/ul>\n<p>Boise Airport, about 45 miles west of Mountain Home, is the nearest commercial airport.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong>Where is Elmore County?<\/strong><br \/>It is in south-central Idaho, along the Snake River between Boise and Twin Falls, extending north into the Sawtooth and Boise National Forests.<\/p>\n<p><strong>What is the population of Elmore County?<\/strong><br \/>28,666 people, per the 2020 census.<\/p>\n<p><strong>How big is Elmore County?<\/strong><br \/>3,101 square miles (8,030 km2), including 26 square miles of water.<\/p>\n<p><strong>What is the county seat of Elmore County?<\/strong><br \/>Mountain Home is the county seat and largest city.<\/p>\n<p><strong>How many towns are in Elmore County?<\/strong><br \/>Two incorporated cities (Mountain Home and Glenns Ferry), two census-designated places, and roughly eight smaller unincorporated communities.<\/p>\n<p><strong>What ZIP codes are in Elmore County?<\/strong><br \/>Main ZIP codes include 83647 (Mountain Home), 83623 (Glenns Ferry), 83633 (King Hill), and 83648 (Mountain Home AFB).<\/p>\n<p><strong>What is Mountain Home Air Force Base?<\/strong><br \/>An active U.S. Air Force base just southeast of Mountain Home, home to the 366th Fighter Wing and the county&#8217;s largest employer.<\/p>\n<p>More counties in this state: <a href=\"https:\/\/townsvillages.com\/us\/category\/idaho\/\">Towns and villages in Idaho<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Elmore County is a county in Idaho, United States, stretching from the Snake River plain north into the Sawtooth and Boise mountains. It had a population of 28,666 at the 2020 census and covers 3,101 square miles (8,030 km2) centred near 43&deg;20&prime;N 115&deg;28&prime;W. Mountain Home is the county seat and its postal code is 83647. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Towns & Villages in Elmore County, Idaho","_seopress_titles_desc":"Elmore County, Idaho: population, towns, ZIP codes, Mountain Home AFB, geography, and neighboring counties in this south-central Idaho county guide.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[19],"tags":[6],"class_list":["post-2550","post","type-post","status-publish","format-standard","category-idaho","tag-towns-and-cities","entry"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/posts\/2550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/comments?post=2550"}],"version-history":[{"count":2,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/posts\/2550\/revisions"}],"predecessor-version":[{"id":11061,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/posts\/2550\/revisions\/11061"}],"wp:attachment":[{"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/media?parent=2550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/categories?post=2550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/townsvillages.com\/us\/wp-json\/wp\/v2\/tags?post=2550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}