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Worst Cities for Allergies in the US

Top Cities with the Highest Pollen Counts

What Is the Worst Cities for Allergies in the US?

Some US cities are dramatically worse for allergy sufferers than others — due to geography, climate, and the types of plants that dominate the landscape. Cities in the South and Midwest consistently top the lists for highest pollen counts and longest seasons.

Peak season: Year-round — varies by city and allergen type

Most affected regions: South, Midwest, Southeast, Mid-Atlantic

Common symptoms: Sneezing, itchy eyes, runny nose, congestion, asthma flares.

Tips for High Worst Cities for Allergies in the US Days
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Location Matters
Cities surrounded by forests, farmland, or in warm climates tend to have longer, more intense pollen seasons than coastal or high-altitude cities.
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Wind Makes It Worse
Flat, windy cities like Wichita and Oklahoma City see pollen travel further and concentrate in the air longer than hilly or forested areas.
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Warm Winters = Longer Seasons
Cities in the South like Atlanta, San Antonio, and Jacksonville have pollen seasons that can run 8–10 months per year due to mild winters.
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Check Before You Move
If you have allergies, check pollen data for any city you're considering moving to — counts can vary 5–10× between cities.
Check Worst Cities for Allergies in the US by City
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Frequently Asked Questions

Which US city has the worst pollen count?

Consistently ranked among the worst: Wichita KS, Louisville KY, Oklahoma City OK, Dayton OH, McAllen TX, Atlanta GA, and Jackson MS. These cities combine high pollen volume, long seasons, and weather patterns that keep pollen airborne.

What makes a city bad for allergies?

The worst allergy cities combine several factors: warm climate that extends the season, local vegetation producing highly allergenic pollen (oak, ragweed, cedar), flat terrain and wind that spreads pollen widely, and high humidity that also promotes mold growth.

Which cities are best for allergy sufferers?

Cities with lower pollen counts tend to be coastal, high-altitude, or in drier climates: Portland OR (rainy climate washes pollen), San Francisco CA (cool marine layer), Denver CO (shorter season), and cities in Alaska or the desert Southwest (low plant diversity).