Most Americans assume that literacy is largely a solved problem in a wealthy, developed nation. The numbers tell a different story. In 2024, roughly one in five adults in the U.S. were found to be illiterate, while more than half of adults had a literacy level below a sixth grade standard, according to the National Literacy Institute. That’s not a rounding error. It represents tens of millions of people navigating daily life with serious reading limitations.
The average literacy score for U.S. adults dropped 13 points between 2017 and 2023. Between those same years, the percentage of adults performing at the lowest proficiency level increased by 9 percentage points – the first statistically significant drop since initial data collection began in 2012. The state-by-state picture is where the real surprises emerge, from results that confirm long-held assumptions to others that flip expectations entirely.
California: The Most Surprising Bottom Ranking
California’s roughly one in four adults lacking basic prose literacy skills gives it the lowest literacy rate in the nation, at 76.9%. For the world’s fifth-largest economy by GDP, that number lands hard. California’s literacy rate affects approximately 7.8 million adults in the nation’s most populous state.
The national literacy survey was conducted only in English, and nearly one in five adults in California say they speak English “less than very well,” according to American Community Survey data. California has for years spent roughly 13 percent less than the national average on K-12 schools. The combination of a massive multilingual population and chronic underinvestment in education creates a gap that is hard to close quickly.
New Mexico and Louisiana: Tied at the Very Bottom on PIAAC Scores
New Mexico and Louisiana share the lowest adult literacy scores in the nation on the PIAAC assessment, both sitting at 251.5 out of a possible 500. Mississippi follows just slightly above them. These three states have clustered near the bottom of national literacy rankings for years, though the reasons differ somewhat between them.
New Mexico holds the lowest child literacy rate in the country as of 2024. Both Mississippi and Louisiana sit at 84.0% on broader adult literacy measures, continuing to address historical educational inequities, while New Mexico grapples with rapid multilingual educational needs that complicate literacy instruction. The child literacy crisis in New Mexico is especially significant because early reading failure tends to compound over time.
Mississippi’s Unexpected Turnaround Story
Mississippi, once ranked 49th nationally in fourth-grade reading scores in 2013, now ranks ninth in the nation and leads the country in overall reading improvement. That shift is one of the most dramatic reversals in American education history. Mississippi adopted the Literacy-Based Promotion Act in 2013, which required students to demonstrate reading proficiency before advancing past third grade and invested in teacher training around phonics-based instruction. Within a decade, the state climbed from near the bottom of national fourth-grade reading scores toward the middle.
Mississippi students were performing a full grade level below their peers around the country as recently as 2013, but by 2024, they were performing nearly half a grade level above the average U.S. student. Mississippi education leaders report that 37 states, including Florida, Texas, and North Carolina, have now reached out to the state for literacy policy guidance and support. A state once synonymous with educational failure is now the country’s model for reform.
New York: High Degrees, Surprisingly Low Literacy
New York has the second-highest percentage of adults lacking basic prose literacy skills at 22.1%, giving it a literacy rate of just 77.9%. Despite this, New York has the ninth-highest percentage of adults with Bachelor’s degrees or higher, at 35.7%. That contrast is genuinely striking. A state celebrated for its universities and cultural institutions still struggles with fundamental reading skills across a large portion of its adult population.
The bottom of the literacy ranking is not a map of bad schools. It is a map of where people who speak other languages live. That distinction matters, because these same states often lead the country in university graduation rates, research output, and economic productivity. New York’s position near the bottom reflects demographic complexity more than school failure, though the practical consequences for residents are the same either way.
Florida and Texas: Population Growth Pushing Rates Down
Florida has the third-highest percentage of adults lacking basic prose literacy skills, at nearly one in five, giving it a literacy rate of 80.3%. It also has the lowest number of public libraries per 100,000 residents in the country. Texas sits at an 81.0% literacy rate, with 19% of adults lacking basic prose literacy skills, and has the fourth-lowest number of libraries per 100,000 residents.
Texas and Florida show the same pattern – both rank in the bottom five for literacy and both have among the nation’s largest immigrant populations. The 10 counties with the highest percentage of their populations at or below Level 1 literacy are all in Texas, primarily along the U.S.-Mexican border, according to APM Research Lab. Rapid population growth, combined with limited library infrastructure, compounds the challenge significantly in both states.
New Hampshire: The Nation’s Literacy Leader
New Hampshire has the lowest percentage of adults lacking basic prose literacy skills, at 5.8%, giving it a literacy rate of 94.2%. On the PIAAC scoring scale, New Hampshire holds the highest literacy score in the U.S. at 278.9. That places it firmly in Level 3 proficiency, meaning the average adult can identify rhetorical structures, evaluate evidence, and make inferences from complex texts.
About 36.6% of adults in New Hampshire have a Bachelor’s degree or higher, the seventh-highest rate in the country, and 60.8% of the population are registered library users, also the seventh-highest in the country. The state’s demographics help explain a lot: it’s a relatively homogeneous, English-speaking population with a strong public library culture. The highest literacy rates in the country belong to small, northern states where nearly everyone grew up speaking English.
Minnesota and the Midwest Advantage
Minnesota has the second-highest literacy rate in the country at 94.0%, with only 6% of adults lacking basic prose literacy skills, and about 69.9% of Minnesota residents are registered library users – the second-highest rate in the country. The Midwest as a whole punches well above its weight on literacy. The gap between the Midwest’s 92.1% average literacy and the South’s 85.7% average is the widest regional divide in the data, and it shows up in high school completion rates too, with the Midwest averaging 91.5% against the South’s 87.9%.
Missouri has a literacy rate of 92.5%, good for the top 10, while its education quality score sits near the bottom half nationally. Indiana follows the same pattern: a 92.0% literacy rate alongside a below-average education score. These states have English-speaking populations with high basic reading skills but lower rates of college attendance. Basic literacy and advanced educational attainment, it turns out, are measuring quite different things.
The Real Cost Hidden Behind the Numbers
Low levels of literacy cost the U.S. up to $2.2 trillion per year. Research indicates that two out of three students who cannot read correctly by fourth grade end up on welfare or in jail. These aren’t abstract statistics – they represent a cycle that feeds directly into poverty, unemployment, and diminished civic participation for millions of people.
Approximately 28% of adults, roughly 58.9 million people, read at the lowest literacy levels, limiting their reading comprehension to simple, short sentences. The average annual income for adults reading at a sixth-grade level is around $63,000, compared to just $34,000 for those reading below a third-grade level. Research also suggests that an increase of just 1% in literacy scores leads to a 2.5% rise in labor productivity and a 1.5% rise in GDP. The economic argument for closing these gaps is as strong as the moral one.
Louisiana’s Surprising Climb and What Other States Are Watching
Louisiana jumped from 50th in fourth-grade reading in 2019 to 16th in 2024 by implementing a comprehensive literacy plan rooted in phonics, transforming how reading is taught statewide and equipping educators with the training to help students thrive. That’s a dramatic leap in just five years. Louisiana implemented a similar reading program alongside Mississippi, beginning in 2012, and saw similar results. Tennessee borrowed from Mississippi and Louisiana’s approaches starting in the 2018-19 school year, with Alabama following in the 2019 legislative session.
Mississippi’s literacy program costs approximately $15 million annually, representing just 0.2% of the state budget in 2023, or about $32 per student. The return on that modest investment has been enormous in measurable reading gains. Mississippi’s adult literacy rate of 84.0% has not yet reflected these improvements in the K-12 pipeline, but the shift is underway – and what a state achieves with its children today will eventually show up in its adult statistics a generation from now.
The Broader Trend Nobody Wants to Admit
In 2024, roughly one in five adults in the U.S. were found to be illiterate, while more than half had literacy below a sixth-grade level. The literacy rate in the U.S. appears to be decreasing, down nearly 10 points since 2017. The COVID-19 pandemic significantly accelerated existing literacy challenges, with the steepest declines occurring between 2020 and 2021. While data from 2023 to 2025 shows stabilization at 79% overall literacy, this plateau represents a level that falls short of pre-pandemic achievement.
State-by-state analysis reveals dramatic disparities, with New Hampshire leading at 94.2% and California ranking lowest at 76.9% – a gap of more than 17 percentage points. A critical caveat in all of this is that the PIAAC assessment measures literacy in English only. A resident who reads a Spanish-language newspaper every day, manages household finances, and communicates fluently in written Spanish would still score poorly on this assessment if her English reading skills are limited. The data is real, but what it measures – and what it misses – shapes every conclusion drawn from it.
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