Top Delaware Towns for Stinging Insect Activity: A 2026 Report

For Delaware homeowners, stinging insect activity is largely a late-summer concern. Wasps, hornets, and yellowjackets become more noticeable around decks, sheds, rooflines, trash cans, gardens, and outdoor gathering areas as colonies grow.

Green Pest Solutions analyzed local service data to identify which Delaware communities report the most stinging insect activity per home. The results point primarily to northern New Castle County, but they also show that current concentration and recent momentum are not always the same.

The local picture

• Green Pest Solutions logged 317 stinging insect service requests across Delaware from 2024 through mid-2026.
• Delaware runs below the wider regional average overall, but Hockessin stands out at 2.1× the typical-area rate.
• Hockessin and Middletown currently have the highest report rates per home.
• Bear, Newark, and New Castle are gaining activity faster than the wider region, making them important communities to monitor.
• Approximately 72% of Delaware’s annual reports occur in July, August, and September.

Delaware stinging insect hotspots

The rankings compare the number of Green Pest Solutions stinging insect service requests per home in each town with the average across our service region.

Hockessin tops the list. Stinging insect reports there occur about 2.1× more often per home than in a typical area across our service region.

A rate of 1× represents a typical area. A rate below 1× does not mean stinging insects are absent. It means the town’s service-request rate per home is currently below the regional average.

What is changing across northern Delaware

Hockessin has the strongest current concentration, but the year-over-year data highlights a different set of communities gaining momentum.

• Hockessin● steady remains Delaware’s clearest hotspot, with recent movement approximately in line with the wider region.
• Middletown▼ easing remains elevated, but its activity is growing more slowly than the region overall.
• Bear▲ climbing currently sits near the regional average but is gaining activity faster than the wider market.
• Newark▲ climbing remains slightly below the regional average while showing positive momentum.
• New Castle▲ climbing shows a similar pattern, with a below-average current rate but faster recent growth.

How to interpret the trend: “Climbing” means activity increased faster than the wider region. “Easing” means it increased more slowly. “Steady” means it remained approximately in line. Delaware’s town-level counts are smaller than those in Pennsylvania and New Jersey, so these trends should be treated as directional.

When Delaware homeowners should be most alert

Stinging insect activity stays relatively low through winter, begins increasing in spring, and rises sharply during summer. Reports peak in August, with September remaining nearly as active.

Where Delaware homeowners may find nests

• Under eaves and soffits: Check rooflines, gutters, porch ceilings, and other sheltered overhangs.
• Inside sheds and attics: Watch for repeated insect traffic around gaps, vents, and openings.
• Beneath decks and outdoor furniture: Inspect protected areas near patios, porches, and backyard gathering spaces.
• In trees and shrubs: Look carefully before trimming branches or working around dense vegetation.
• In the ground: Yellowjackets may establish nests in old rodent burrows, landscape beds, or other underground cavities.

How to reduce stinging insect encounters

• Look for starter nests in spring. Small nests are easier to identify before colonies expand.
• Watch repeated flight paths. Insects repeatedly entering one opening may indicate a concealed nest.
• Cover outdoor food and sweet drinks. These can attract foraging insects during late summer.
• Keep trash and recycling containers sealed. Clean spills and food residue from outdoor bins.
• Use caution while mowing and gardening. Ground-nesting yellowjackets may defend a nest when disturbed.
• Do not swat at active insects. Move away calmly and give them space.
• Do not seal an active nest opening. Blocking an entrance may redirect insects into another part of a structure.
• Use a professional for large or concealed nests. Nests inside walls, above the ground, or near busy areas can be difficult to address safely.

When a sting may require medical attention

Stings can be especially dangerous for people with an allergy. Seek medical help immediately if someone experiences trouble breathing, dizziness, or swelling that extends beyond the sting area.

About this unique local data

Figures reflect stinging insect service requests received by Green Pest Solutions from January 2024 through August 2026. Requests were grouped by service ZIP code and adjusted using U.S. Census home counts so Delaware communities of different sizes could be compared fairly.

This report measures Green Pest Solutions service activity, not the total number of stinging insects or nests in each town. Results may also reflect property characteristics, customer awareness, service availability, and other local factors.

Delaware’s smaller number of service requests means individual yearly changes can have a greater effect on town-level trends. Use these findings as a local planning and prevention resource, not as a guarantee that a particular property has or does not have a nest.

This data is proprietary to Green Pest Solutions and may not be copied, reproduced, distributed, published, or used without prior written consent.