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Women make up a small share of the incarcerated population in the United States, but their numbers have grown faster than any other group. Roughly 219,000 women are incarcerated nationwide, giving the country the highest female incarceration rate in the world. The United States holds just 4% of the world’s female population, yet accounts for a third of the world’s incarcerated women. Between 1980 and 2023, the number of incarcerated women grew by more than 600%, rising from about 26,000 to over 186,000.
This growth is a central argument behind women’s incarceration reform: a one-size-fits-all prison system does not account for how women enter the justice system, what they carry with them, or what they need to safely return home.
What Makes Women’s Incarceration Different
Women in state prisons are more likely than men to be incarcerated for drug or property offenses. About 26% of incarcerated women were convicted of a drug offense, compared to 12% of men, and that share has more than doubled since the 1980s. Most incarcerated women are also mothers: 58% of women in state prisons and 80% of women in jails are mothers, and most were the primary caregiver for their children before arrest. An estimated 58,000 pregnant people enter U.S. jails and prisons each year, which has made prenatal and perinatal care policy a specific focus of female incarceration reform.
The Cost of Incarcerating Women
A 2026 Council on Criminal Justice report found that it costs 25% to 75% more to imprison a woman than a man, largely due to smaller facilities, staffing and classification challenges, and higher healthcare needs. The same research projects that the number of women under correctional supervision will reach 1.1 million by 2035, pushing total system costs up by an estimated $8 billion. These figures are a core part of the economic case for gender-responsive prison reform.
Why Female Incarceration Rates Vary So Much by State
Female imprisonment rates differ sharply from state to state. Idaho has the highest rate of female imprisonment at 152 per 100,000 women, while Rhode Island has the lowest at just 6 per 100,000. This gap shows that women’s incarceration reform is not only a federal policy question — state-level sentencing, bail, and diversion practices play an outsized role in how many women end up behind bars.
Reentry Programs for Women: What Actually Works
Effective reentry programs for women prisoners tend to share a few features: they keep mothers connected to their children during incarceration, provide trauma-informed mental health and substance-use treatment, and offer housing support that accounts for family reunification rather than treating reentry as an individual problem. Because 82% of women under correctional control are already supervised in the community rather than incarcerated, many reform advocates argue that expanding diversion and community supervision for non-violent offenses is one of the most cost-effective paths forward.
Gender-Responsive Prison Reform: Key Directions
- Gender-responsive housing and programming designed around women’s pathways into the justice system
- Expanded community supervision and diversion for non-violent drug and property offenses
- Trauma-informed mental health and substance-use treatment inside correctional facilities
- Reentry programs that preserve mother-child relationships and support family reunification
- Compassionate release policies for aging and elderly women prisoners
The Bottom Line
Women’s incarceration reform is gaining attention because the data makes a clear case for it: women are being incarcerated at a faster-growing rate than men, at a higher cost per person, largely for non-violent offenses, and while carrying caregiving responsibilities the system is not designed around. Reform proposals that treat women as a distinct population — not a smaller version of the male prison system — are increasingly seen as the most effective path to reducing both the human and financial cost of incarceration.