Orkin’s 2025 list shows where mosquito treatments spiked the most

Mosquito treatment demand surged in several U.S. metros

Mosquito season is heating up across the U.S., and some cities are seeing far more buzzing visitors than others. From surprising northern hotspots to southern metros struggling with relentless pests, the patterns may catch you off guard.

Orkin’s 2025 rankings reflect where it performed the most new residential mosquito treatments from April 2024 through March 2025.

Los Angeles is ranked the most mosquito‑active city in the US

Los Angeles claims the No. 1 position on Orkin’s 2025 Top 50 Mosquito Cities list, marking its fourth year ranked highest for mosquito control treatments. The ranking reflects the number of new residential mosquito treatments performed by Orkin.

Mosquito control professionals emphasize that high treatment numbers often indicate conditions favorable to mosquito breeding, such as warm temperatures and standing water. Los Angeles’ continued top spot signals persistent mosquito issues.

Chicago ranks second among mosquito‑active U.S. cities

Chicago is ranked second on Orkin’s 2025 Top 50 Mosquito Cities list based on the volume of mosquito treatments in its metro area. The data cover residential mosquito treatments, providing a consistent basis for comparison with other U.S. cities in this reporting year.

Being high on the list suggests that mosquito pressure in Chicago is notable, especially during the peak summer months when adult mosquitoes are most abundant. These rankings help residents understand how local pest activity compares nationally.

New York City is the third highest mosquito city

New York ranks third on Orkin’s 2025 Top 50 Mosquito Cities list, based on the company’s new residential mosquito treatments in the metro area.

Residential mosquito treatment data show that New Yorkers are requesting services at a high rate, which is why the city appears near the top of the annual list.

Being third implies that conditions in New York support substantial mosquito presence during peak seasons, and residents should expect frequent biting insects in parks. These conditions are consistent with patterns seen in other large metropolitan areas.

Atlanta ranks fourth for mosquito pressure

Atlanta ranks fourth in Orkin’s 2025 Top 50 Mosquito Cities list, showing that its metro area experiences high mosquito service demand. The ranking is derived directly from the number of new residential mosquito treatments over the past year.

This consistent presence near the top of the list highlights mosquito activity as a recurring issue for residents and businesses during warmer months. Regular rainfall and humid conditions typical of the Southeast support mosquito breeding.

Detroit enters the top five mosquito cities for the first time

Detroit appears at No. 5 in Orkin’s 2025 Top 50 Mosquito Cities, marking its first entry into the top five rankings in recent years. This rise reflects increased residential mosquito treatments in the metro Detroit area.

Detroit’s higher placement suggests mosquito pressure is stronger there than in many other parts of the country. This shift highlights that more northern cities are experiencing measurable mosquito activity.

Houston remains a high‑ranking mosquito city

Houston ranks sixth in the 2025 Top 50 Mosquito Cities list from Orkin, showing that mosquito activity remains substantial in the region. Mosquito treatments in Houston continue to be among the most frequent in the nation.

The high ranking underscores that mosquitoes are a persistent nuisance and health concern across the Gulf Coast. Local pest professionals advise residents to remain vigilant about eliminating breeding sites.

Dallas ranks high on mosquito activity list

Dallas is ranked seventh in the Orkin 2025 Top 50 Mosquito Cities, indicating notable mosquito control activity compared with other U.S. cities. Homeowners and pest control services have undertaken many mosquito treatments.

Warm temperatures and periodic rainfall feed breeding sites in yards, parks, and low‑lying areas, keeping mosquito populations active for much of the warmer season. Dallas residents are encouraged to use repellents and reduce standing water.

Washington, D.C. has strong mosquito presence

Washington, D.C., is ranked eighth on Orkin’s 2025 Top 50 Mosquito Cities list due to heavy demand for mosquito treatments in its metro area. This high placement means that local pest professionals are responding to consistent mosquito activity.

The ranking reflects how city infrastructure, including parks, streams, and gardens, can provide habitat for mosquitoes, prompting treatment requests and control measures. Residents are advised to protect themselves with screens and repellents.

Cleveland enters the top ten for mosquito activity

Cleveland is ranked ninth on Orkin’s 2025 Top 50 Mosquito Cities list, joining the top ten for the first time this year. The city’s appearance reflects increased mosquito treatments compared with previous seasons.

Cleveland’s jump suggests that mosquito control demand is rising in some northern metros, which may reflect weather swings, local breeding conditions, or changes in reporting or treatment behavior.

Denver shows growing mosquito treatment needs

Denver ranks tenth on Orkin’s 2025 list of Top 50 Mosquito Cities, indicating that its metro area has seen more mosquito control activity. Though historically lower on such lists, Denver’s appearance in the top ten highlights changing patterns.

This elevated ranking shows that mosquito activity is not limited to traditionally warm and humid regions, and that even in dry climates with standing water pockets, mosquitoes can still breed. Residents in Denver are reminded to maintain yards and drains.

West Nile virus remains the most common mosquito‑borne disease

West Nile virus is the most frequently reported mosquito‑borne disease in the continental United States, transmitted when infected mosquitoes bite people. According to the CDC, most infections cause mild or no symptoms.

Public health agencies monitor mosquito populations and infection rates to guide surveillance and control actions each season. Preventive measures, such as using EPA‑registered repellents and eliminating standing water, help reduce risk.

In other news, Texas passes new measures to address an increase in squatter-related cases.

Mosquito biology makes control challenging across regions

CDC estimates that over 200 mosquito species live in the continental United States and U.S. territories, and only a smaller subset commonly spreads germs that make people sick.

Effective mosquito control focuses on both reducing adult populations and preventing larvae from developing.

The internet is also talking about cases of a highly contagious virus identified at two major US airports.

Share your experiences with local mosquito activity in the comments, and let us know which city surprised you the most.

This slideshow was made with AI assistance and human editing.

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