Feral Swine in the US: The $2.5 Billion Damage Problem and How It Is Being Fought

Feral swine are the most destructive invasive vertebrate in the United States. With an estimated population exceeding 6 million animals spread across at least 35 states, they cause an estimated $2.5 billion in damage annually through agricultural destruction, environmental degradation, disease transmission, and infrastructure damage. The USDA’s National Feral Swine Damage Management Program, refunded in 2025 through the One Big Beautiful Bill Act, represents the largest coordinated effort to control a mammalian invasive species in American history.

The Scale of Destruction

Updated estimates put feral hog damage at over $1.6 billion in annual agricultural losses across just 13 southern states, covering impacts to livestock, pastureland, and six major crops. When environmental damage, disease costs, vehicle collisions, and control program expenses are included, the total reaches $2.5 billion nationally.

The damage takes multiple forms. Feral swine root through crop fields, destroying entire plantings overnight. They prey on livestock, particularly lambs and goat kids. They contaminate water sources with fecal bacteria. They damage levees, golf courses, lawns, and cemetery grounds. They destroy native habitat through aggressive foraging that strips ground cover and exposes soil to erosion.

For a detailed look at how wild boar damage affects specific agricultural operations, see our guide on how wild boar damage agricultural lands.

Disease Threat

The disease burden compounds the agricultural damage. Feral swine carry at least 30 viral and bacterial diseases and nearly 40 parasites transmissible to humans, pets, livestock, and wildlife. Brucellosis, pseudorabies, leptospirosis, E. coli, and salmonella are among the most concerning.

Feral swine co-occur with up to 87.2% of imperiled species in the contiguous U.S. that are susceptible to their direct impacts, according to research published in PMC. As feral swine expand their range, the number of threatened and endangered species at risk increases proportionally.

The disease concern extends beyond animal health. Water quality degradation from feral swine fecal contamination affects recreational waters, drinking water sources, and shellfish harvesting areas. With southeastern watershed occupancy by wild pigs approaching 91%, quantifying and mitigating water quality impacts has become an urgent research priority.

For background on the specific diseases feral swine carry and transmit, see our article on wild boar diseases: ASF, brucellosis, and parasites.

The National Feral Swine Damage Management Program

Congress created the USDA APHIS National Feral Swine Damage Management Program in 2014 with dedicated appropriations. The program coordinates federal, state, tribal, and private efforts to reduce feral swine populations and limit their geographic spread.

Since inception, the program has removed over 570,000 feral hogs, eliminated populations in five states, and moved 18 states into lower severity categories. Research estimates that by slowing the spread of wild pigs, the program safeguarded $40.2 billion worth of agricultural and ecological resources between 2014 and 2021.

The program employs an integrated approach combining:

Aerial operations — Helicopter-based removal, using thermal imaging to locate animals in dense vegetation, is the most efficient method for removing large numbers of feral swine from open and semi-open habitats.

Trapping — Corral traps targeting entire sounders (family groups) prevent the dispersal that individual removal methods can trigger. Trap technology has advanced significantly, with GPS-enabled gate triggers and camera monitoring allowing operators to confirm that entire groups are inside before closing.

Ground operations — Night shooting with thermal optics targets animals in areas where aerial operations are impractical. Professional operators can remove significant numbers during concentrated ground campaigns.

Research and monitoring — The program funds research on feral swine behavior, population modeling, disease ecology, and damage assessment to inform management decisions.

For a deeper look at the methods wildlife managers use to track and manage wild boar populations, see our article on wild boar research methods: GPS and camera traps.

The Farm Bill Pilot Program

The 2018 Farm Bill authorized the Feral Swine Eradication and Control Pilot Program with $75 million in funding, jointly administered by APHIS and the Natural Resources Conservation Service. The program has supported 34 active projects across 12 southern states, providing financial and technical assistance to landowners and working through cooperative agreements with state wildlife agencies.

The pilot program has proven the value of coordinated landscape-level management. Feral swine do not respect property boundaries, and removing animals from one ranch while leaving adjacent populations intact produces only temporary relief. The pilot program’s cooperative approach — organizing multi-property, multi-agency campaigns — addresses this fundamental challenge.

Why the Problem Keeps Growing

Despite significant management efforts, the feral swine problem continues to expand geographically. Several factors work against containment.

Reproductive capacity — Feral swine are among the most prolific large mammals on earth. Sows can breed at six months of age and produce two litters per year with four to twelve piglets each. A single unmanaged sounder can grow exponentially within a few years.

Adaptability — Feral swine thrive in virtually every habitat type found in the contiguous U.S., from swamps and forests to grasslands and agricultural landscapes. They are intelligent, omnivorous, and highly adaptable to management pressure. For more on their remarkable intelligence, see our article on wild boar intelligence, problem solving, and learning.

Human-assisted dispersal — Illegal transportation and release of feral swine for hunting purposes remains a significant driver of range expansion. Despite being illegal in most states, deliberate releases into new areas continue to occur.

Funding limitations — The USDA estimates that controlling feral swine populations effectively would require annual spending significantly above current appropriations. Without adequate sustained funding, management efforts can only slow expansion rather than reverse it.

What Landowners and Outdoor Enthusiasts Should Know

If you live in or visit areas with feral swine:

Report sightings to your state wildlife agency, especially in areas where feral swine have not been previously documented
Do not transport or release feral swine under any circumstances — it is illegal and dramatically worsens the problem
Use recommended biosecurity practices if you raise livestock in feral swine territory
Report damage to USDA APHIS Wildlife Services, which can provide direct management assistance

The battle against feral swine in America is one of the most significant wildlife management challenges of the 21st century. Progress is real but insufficient, and the outcome depends on sustained public investment and cooperation between agencies, landowners, and communities.

Sources

Feral Swine: Managing an Invasive Species — USDA APHIS — accessed March 26, 2026
Feral hog elimination efforts could save US agriculture billions — Van Trump Report — accessed March 26, 2026
A globally distributed alien invasive species poses risks to US imperiled species — PMC — accessed March 26, 2026
Feral Swine Eradication and Control Pilot Program — NRCS — accessed March 26, 2026