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Treasure Idaho

Idaho

Star, Idaho

Ada County18,208 people

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Star, Idaho

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  • 18,208Population

About Star

Star is a city in Ada County. About 18,208 people lived here in 2024, by Census estimate. It sits at about 2,500 feet, 9 miles northeast of Nampa in a straight line.

Places listed for this area include Blake Haven Park and Pavillion Park.

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Moving to Star

Public schools in Star

All 2

District, enrollment, and students per teacher from the federal 2024-25 directory. No ratings.

Services for Star

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DMV counters are the county offices. A gas utility appears only when its public list names Star.

  • Intermountain Gas · natural gas, on the company's town list. A main is not guaranteed at every address.

Allergy ratings in Star

What a typical year looks like: Low, Moderate or High for each pollen season, plus wildfire smoke. Typical, general guidance. It is not medical advice. Pollen and smoke change with the weather every year, and what bothers you depends on what you are allergic to. See an allergist for testing.

  • Spring trees

    March to June

    Moderate

    Rating: Moderate, on a scale of Low, Moderate, High, Very High. Peaks in April
  • Early-summer grass

    Late May to July

    High

    Rating: High, on a scale of Low, Moderate, High, Very High. Late May to early July, highest the first two weeks of June
  • Fall weeds and sagebrush

    August to October

    High

    Rating: High, on a scale of Low, Moderate, High, Very High. Weeds from mid-August, sagebrush heaviest mid-September to mid-October
  • Wildfire smoke

    Mostly July to September

    High

    Rating: High, on a scale of Low, Moderate, High. 12.6 days a year with air quality over 100. Worst year 35 (2024).

Counted nearby. Pollen ratings come from the Boise station in the Treasure Valley, 15 miles away.

How these ratings are worked out

Pollen is rated on the National Allergy Bureau bands for the grains of pollen in a cubic meter of air. Trees: Low under 15, Moderate 15 to 89, High 90 to 1,499. Weeds: Low under 10, Moderate 10 to 49, High 50 to 499. Grass: Low under 5, Moderate 5 to 19, High 20 to 199. The band is the one reached on the busiest quarter of counted days. A rating is typical, not a forecast: one wet or windy year can move it.

Spring trees, Moderate. Boise NAB station, 62 counted days in 2017 to 2021: on the busiest quarter of days the tree count was 74 grains per cubic meter or more, which the NAB bands call Moderate. On the busiest tenth of days it was 104 or more. That is a short record, so treat it as a rough guide. The Allergy Group's own Boise counts agree: 25 to 30 tree pollen on a daily sample starts mild to moderate symptoms, and cottonwood and juniper reach high counts in April in dry springs.

Early-summer grass, High. The Allergy Group (Boise) reports grass counts over 100 on its 24-hour sampler in early June, and 30 is enough to bother people who react to grass. NAB calls 20 to 199 High. The NAB grass bands: Low under 5, Moderate 5 to 19, High 20 to 199, Very High 200 or more grains per cubic meter.

Fall weeds and sagebrush, High. Boise NAB station, 37 counted days in 2017 to 2019: on the busiest quarter of days the weed count was 54 grains per cubic meter or more, which the NAB bands call High. On the busiest tenth of days it was 73 or more. That is a short record, so treat it as a rough guide. The Allergy Group's own Boise counts agree: chenopod (tumbleweed, kochia, Russian thistle) peaks at 30 to 60 in late summer, and sagebrush runs 400 to 500 on a good day from mid-September to mid-October.

Wildfire smoke, High. The average number of days a year the EPA's air quality index passed 100 ("unhealthy for sensitive groups" or worse), 2021-2025. Under 3 days is Low, 3 to 9 Moderate, 10 or more High. That grouping is ours, not the EPA's. Ada County has its own EPA air monitor. The count includes any cause, but across Idaho's monitors 86% of those days fell in July to September and 94% were fine particles (PM2.5), which is what wildfire smoke is made of (570 county-days, 2021-2025).

Year to year. The Asthma and Allergy Foundation of America ranked Boise 95th of 100 U.S. metros for pollen in its 2025 report and 1st in its 2026 report, after a wet winter and a long grass season. Expect a typical rating to miss some years.

Not rated. Mold: no published mold spore counts for Idaho towns are in the data used, so there is no mold rating. House dust, pets and food allergies are outside this rating.

Sources

Today

Pollen data through 2003-2024, smoke data 2021-2025. Checked 2026-10-03.

Videos about Star

Map of Star

Parks, new home communities, homes for sale and stays listed in town. Select a pin to open it.

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Parks in Star

6 named parks on OpenStreetMap.

  • Blake Haven Park
  • Hunters Creek Sports Complex
  • Keith Bird Legacy Park
  • Pavillion Park
  • Star Riverwalk Park
  • West Bridgetower Community Park

Parks, trails and things to do

All of Idaho

Places in and around Star, nearest first: everything tied to Star plus anything within 15 miles of town.

Things to do (nearest 18 of 23)

Lakes

Museums

Historic sites

Attractions

Parks (nearest 12 of 210)

Trails (nearest 12 of 118)

Distances are straight-line miles. From state and federal agency pages, the USGS place names list and OpenStreetMap contributors. Checked October 2, 2026. Check the official page for hours, fees and closures before you go.

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Moving checklist: setting up a home in Star

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Jobs in Star

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