The area was known as Island Park long before the 33-mile (53 km)-long town was incorporated. Henry's Lake Flat is a flat bottomed valley between high mountain ranges with Henry's Lake at the northwest end of the flats. Mt. Jefferson, south of Henry's Lake, is at 10,203 feet and Targhee Peak, north of Henry's Lake is at 10,240 feet. The most famous of Island Park's peaks, however, is the 9,886-foot Sawtell Peak due to its beauty. Sawtell Peak is also south of Henry's Lake near Mt. Jefferson and is a landmark visible from nearly anywhere in Island Park.

The Island Park area is mostly forested with many meadows and grasslands. It is mostly level but is surrounded by forested hills and high mountains in the north. The Henry's Fork of the Snake River meanders through Island Park with its headwaters at Henry's Lake and at Big Springs. The Henry's Fork is impounded by Island Park Dam to form Island Park Reservoir at the rim of the caldera just north and just outside of the caldera. In fact, the entire south bank of Island Park Reservoir is formed by the northern slope of the caldera. The Henry's Fork crosses through the caldera and then cascades off from it at Upper and Lower Mesa Falls.

The geography of Island Park is actually unique and distinctive. It is largely flat and it has unusually high precipitation. Island Park is at the same 6,000 feet of elevation as Teton Valley, Idaho, Jackson Hole, Wyoming, or the Centennial Valley, Montana yet these nearby areas are semi-arid prairie or even desert receiving less than 12 inches of precipitation annually while Island Park is forested and green with many steams, ponds, lakes, and meadows. Island Park receives well over 30 inches of precipitation with parts receiving over 50 inches. That is, Island Park has three times the rainfall and snowfall as nearby areas of the same elevation.

Island Park Real Estate

In 2007, there were approximately 227 real estate and property transactions in the Island Park, Idaho area. Prices for property and Island Park Cabins in this community are expected to rise over the next 12 months.

The median home cost in Island Park is $211,500.*

Island Park Neighborhoods

Local neighborhoods and subdivisions include: AK Rasmussen Subdivision, Arrowhead Development Subdivision, Aspen Ridge, Bensons BootJack Homesites, Baker Vacation Homesites, Berretts Summer Home Subdivision, Berrett Homesites, Big Springs Acres Subdivision, Bighorn Hills Estates, Black Mountain Meadows Subdivision, BlueCreek Subdivision, Box Canyon Ranches, Buffalo River Estates, Buffalo Summer Homes, Buffalo Basin Subdivision, Centennial Cove Subdivision, Centennial Mountain Shores Subdivision, Centennial Shores Subdivision, Cowan Subdivision, Shotgun Subdivision, Cowbell Subdivision, DH McGee Summer Homestead, Deer Crest Subdivision, Douglas Guiver Subdivision, Eagles Nest Subdivision, Eagles Nest Subdivision, Edwards Homesite Subdivision, Elk Creek Estates, Elk Crossing at Black Mountain Subdivision, Elk Run Subdivision, Fisher Pointe Subdivision, Fransenville Subdivision, Goosebay Estates, Harris Homesites, Henrys Lake Lodge, Henrys Lake Overlook, Henrys Lake Estates, Henderson Homesites, IP Bills Island Subdivision, Ice House Creek Subdivision, Island Park Subdivision, Island Park Village, J&T Ranch Estates, Lakeside Subdivision, Lakeview Trailer Estates, Lakeview Estates, Lakeview Ranches, Last Chance Ranches, Macks Summer Homes, Magleby Survey, Meadow View Subdivision, Meadow Vue Subdivision, McCrea Ranch, McGee Summer Homes, Mill Creek Estates, Moedl Subdivision, Moose Bay Subdivision, Moose Creek Subdivision, Mortensen Subdivision, Northshore Club Subdivision, Old West Ranches, Palmer Summer Home Sites Subdivision, Phillips Lodge, Pine Haven Subdivision, Pinehaven Subdivision, Pintail Point Subdivision, Ponds Lodge Subdivision, Ralph A Thompson Subdivision, Ranch McCrea Subdivision, Rexburg Boat Club, Riverside Village at Ponds Lodge, Robbins Subdivision, Robbins Summer Homesites, Sawtelle Estates, Sawtelle Mountain Subdivision, Sawtelle Recreational Area, Sherwood Subdivision, Shotgun Village Subdivision, Shotgun West Subdivision, Silver Hawk Subdivision, Steve Smith Survey, Silverhawk Subdivision, Southshore Subdivision, Stonegate Subdivision, Thomson Randall, Timbercreek Estates, Two Top Estates, Valley View Ranch Subdivision, Websters Henrys Lake Ranch, Websters Lakeview Subdivision, Weeks Pine Acres, Welling Addition Subdivision, Wilding Summer Homesites, Whispering Pines Subdivision, Wispering Pines Subdivision, Yale Creek Cabin Sites, Yellowstone Acres, Yellowstone Basin Subdivision, Green Acres, Mountain View Subdivision, Tricondico Subdivision, Austin Julian Subdivision, Fish Haven Subdivision, Stewart Homesites, and other Island Park Subdivisions in Island Park Idaho, and Island Park Cabins.

Local zip codes in this community include: 83429 and83433.

Island Park Recreation

Exceptional recreational opportunities in and around the region include Extreme and Liesure Snowmobiling, Camping, Hiking, Trail Riding, Water Sports, Fishing, Dirt Bike and ATV riding, Rafting, Hunting, and much more. Other notable features of the area is the beautiful country landscapes, mountains, wildlife, lakes, streams, and scenery.