As National Cancer Rates Drop, One State Is Quietly Facing a Surge

Cancer trends in the United States have improved in important ways, but Iowa has been moving in a different direction. While national cancer death rates have continued to decline and overall cancer incidence has generally been more stable, Iowa has seen its cancer incidence rise since around 2013. The Iowa Cancer Registry estimates that about 21,700 new invasive cancers will be diagnosed among Iowans in 2026, with approximately 6,400 cancer deaths expected this year.

Iowa’s Cancer Trend Took a Different Turn

For years, Iowa’s cancer incidence generally followed the broader national pattern before beginning to rise around 2013. The increase has continued even as the national picture has shown improvement in several important measures, making Iowa an unusual case that researchers are trying to understand. The state has been among only a small number of states where new cancer cases are increasing, and recent data place Iowa second nationally for cancer incidence, behind Kentucky.

Thousands of New Cases Are Expected in 2026

The Iowa Cancer Registry estimates that 21,700 new invasive cancers will be diagnosed in Iowa during 2026. It also estimates about 6,400 Iowans will die from cancer this year, while roughly 175,290 cancer survivors are currently living in the state. The registry’s annual report also found that young adults in Iowa have a significantly higher cancer rate than young adults nationally, while cancer rates among Iowa children and adolescents are similar to U.S. rates.

Five Cancers Are Driving Much of the Difference

Researchers at the University of Iowa and the Iowa Department of Health and Human Services have been examining five major cancers that account for a large share of the state’s new diagnoses: prostate, breast, lung, colorectal and melanoma. These cancers together represent about 55% of the estimated new cancer cases in Iowa this year. The research has found particularly notable differences in rates of lung, prostate and breast cancers as well as melanoma.

Researchers Found Major Risk Factors

The first year of a state-funded investigation found that demographic and behavioral factors could explain a substantial portion of Iowa’s excess cancer burden for the five cancers studied. Researchers reported that after accounting for factors including age, race, tobacco and alcohol use, ultraviolet exposure and county-level radon levels, about 76% of the excess cases could be explained. That finding does not explain every case or eliminate the need to investigate other possible contributors.

Smoking, Alcohol and Other Factors Matter

The research points to several established cancer risk factors that can be addressed through prevention, including tobacco use, alcohol consumption, obesity, ultraviolet exposure and exposure to radon. Researchers say reducing these risks, along with recommended cancer screenings, could lower the state’s cancer burden. At the same time, they emphasize that population-level findings do not account for every individual cancer case and cannot fully explain why Iowa’s overall rates are so high.

Water Quality Has Become a Major Question

Concerns about drinking water have grown alongside the state’s cancer statistics, particularly in heavily agricultural areas where nitrate runoff and other pollutants are part of ongoing environmental discussions. Residents and local health workers interviewed by the USA TODAY Network described increased interest in testing private wells as communities search for possible explanations. However, Iowa health officials stress that cancer incidence data alone cannot establish what caused the increase, and researchers have not reached a definitive conclusion connecting Iowa’s cancer surge to a particular environmental exposure.

Rural Communities Face Additional Challenges

The rise in cancer cases is particularly significant for rural communities where access to specialized medical care can be more limited. The USA TODAY Network’s reporting found cancer centers serving rural Iowa communities treating patients while local health officials field growing questions about cancer and environmental conditions. Iowa’s cancer burden therefore involves not only the number of diagnoses but also the challenge of ensuring patients can obtain screening, treatment and follow-up care close to home.

The State Is Still Searching for Answers

Iowa launched a two-year investigation to better understand why its cancer rates have diverged from national trends. The first year concentrated on demographic and behavioral factors, while the next phase is expected to examine genetic and environmental factors more closely. Researchers have stressed that some cancers still have unexplained differences even after known risk factors are considered, so the investigation is not finished.

Iowa’s Cancer Story Is Still Unfolding

Iowa’s rising cancer incidence stands out against decades of progress in reducing cancer deaths nationally and has prompted researchers, health officials and residents to demand a clearer understanding of what is happening. Current evidence shows that established demographic and behavioral risk factors account for much of the excess burden in several major cancers, but they do not answer every question about the state’s unusually high rates. As the second year of Iowa’s research examines additional genetic and environmental factors, the goal is to turn the statistics into a clearer picture of prevention, risk and care for communities across the state.