Maryland

• 1. Introduction

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  Maryland sits at a crossroads that no other state occupies. It is the only state that simultaneously borders the nation's capital, touches the Atlantic Ocean, reaches into the Appalachian Mountains, and wraps around one of the largest estuaries on earth. At just 12,407 square miles, it is the ninth-smallest state by land area. Yet within those borders lie sandy Atlantic dunes, tidal marshes thick with bald cypress, rolling Piedmont oak forests, and mountain ridgelines above 3,000 feet. That range of landscapes earned it a nickname: America in Miniature.

  But geography is only the beginning. Maryland was founded in 1634 as a haven for persecuted English Catholics, yet Catholics never made up more than a fraction of its population. It was a slave state that fought for the Union. It is a Southern state that most federal agencies classify as Mid-Atlantic. It has the highest median household income of any state, driven in large part by its proximity to Washington, D.C. And today it is one of only nine states where non-white residents form a majority of the population.

  How did this small strip of land between Pennsylvania and Virginia become one of the most densely populated, most economically powerful, and most culturally layered states in the country? The answers reach back to a royal charter granted in 1632, run through the bloodshed at Antietam, and carry forward into the research laboratories and defense corridors that define Maryland today.

• 2. A Colony Born from Persecution

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  George Calvert, 1st Baron Baltimore, died in April 1632 before he could see his dream realized. He had petitioned King Charles I for a charter granting him land between Massachusetts and Virginia, specifically to create a refuge for England's Roman Catholic minority. After his death, the charter passed to his son, Cecilius Calvert, 2nd Baron Baltimore, and was formally granted on the 20th of June, 1632. The colony was named Maryland in honor of Henrietta Maria of France, wife of Charles I. Lord Baltimore had proposed calling it Crescentia, meaning the land of growth or increase, but the king preferred Terra Mariae, Mary Land, and that name was inserted into the bill.

  The first settlers arrived in March 1634, led by Leonard Calvert, the younger brother of Cecilius, who served as the province's first Governor. They purchased their initial settlement site from the paramount chief of the region and established St. Mary's City on the north shore of the Potomac River. St. Mary's would serve as Maryland's capital for 60 years. Tobacco crops thrived quickly, making the colony profitable, though life expectancy ran roughly 10 years shorter than in New England due to malaria, yellow fever, and typhoid.

  The religious sanctuary Maryland was meant to provide proved fragile almost immediately. Catholics were always a minority in the colony, comprising less than 10 percent of the total population. In 1642, Puritans arrived from Virginia and founded what is now Annapolis. Two years later, in 1644, the Puritan William Claiborne seized Kent Island while his associate Richard Ingle seized St. Mary's itself. The two years of Puritan control from 1644 to 1646 became known as The Plundering Time. Claiborne and his allies captured Jesuit priests and sent them back to England. Leonard Calvert retook the colony in 1646 with troops and restored order.

  The House of Delegates passed the Act concerning Religion in 1649, granting liberty to all Trinitarian Christians. Yet within a year the Puritans revolted again, swept Catholics from the legislature, and set up a government that banned both Roman Catholicism and Anglicanism. Mobs burned the original Catholic churches of southern Maryland. The Calvert family regained control in 1658 and re-enacted the Toleration Act. Then England's Glorious Revolution in 1688 triggered yet another reversal: Maryland officially outlawed Catholicism. By 1704, the General Assembly barred Catholics from operating schools, restricted the corporate ownership of property by religious orders, and limited the celebration of Catholic sacraments. Wealthy Catholic planters responded by building private chapels on their estates to practice their faith in relative secrecy. That state of legal suppression persisted until after the American Revolutionary War.

• 3. Lines Drawn in Dispute

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  The royal charter granted Maryland all land north of the Potomac River up to the 40th parallel. When Charles II granted a charter for Pennsylvania in the years that followed, he defined Pennsylvania's southern border at the same 40th parallel. The problem surfaced in 1681: the 40th parallel did not pass near New Castle, Delaware, as Charles II and William Penn had assumed. It fell north of Philadelphia, which Penn had already designated as Pennsylvania's capital. Negotiations opened, and a compromise proposed by Charles II in 1682 collapsed when Penn received the additional grant of what is now Delaware. Penn then argued successfully that the Maryland charter entitled Lord Baltimore only to unsettled lands, and that Dutch settlement in Delaware predated that charter.

  The dispute ground on for generations. It was carried forward by the descendants of William Penn and the Calvert family, neither side able to force a resolution. By the 1730s, tensions had escalated into Cresap's War. Hostilities broke out in 1730, escalated through the middle of the decade, and culminated in Maryland deploying military forces in 1736 and Pennsylvania doing the same in 1737. King George II intervened in May 1738 and compelled a cease-fire. A provisional agreement had been established in 1732, but full negotiations continued until a final border was agreed in 1760. That agreement defined the Maryland-Pennsylvania boundary as the line of latitude now known as the Mason-Dixon line. Maryland's boundary with Delaware was set by the Transpeninsular Line and the Twelve-Mile Circle around New Castle.

  The practical consequence of that long dispute still shapes everyday life. Close to the small western Maryland town of Hancock, less than two miles separate the Mason-Dixon line to the north from the northward-arching Potomac River to the south, creating the narrowest point in the state.

• 4. Slavery, Freedom, and Civil War

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  Harriet Tubman and Frederick Douglass were both born into slavery in Maryland, in Dorchester County and Talbot County respectively, during the decades following the Revolutionary War. Their lives emerged from a society shaped by deep contradictions. Across the Upper South in those same post-war decades, the free Black population grew from less than 1 percent before the war to 14 percent by 1810, as planters influenced by revolutionary ideals and religious preaching freed large numbers of enslaved people. Maryland's economy had been built on plantation tobacco, and demand for cheap labor had driven the importation of both indentured servants and enslaved Africans for generations.

  By the time of the 1860 census, held shortly before the outbreak of the Civil War, 49 percent of Maryland's African Americans were already free, a proportion unmatched in most of the South. That unusual demographic reality shaped what happened next. When war came, Maryland did not secede, though the pressure to do so was severe. In April 1861, federal units marching through Baltimore were attacked by a mob, sparking what historians record as the first bloodshed of the Civil War. President Abraham Lincoln responded by having a number of pro-slavery politicians arrested, including the Mayor of Baltimore, George William Brown. Lincoln suspended habeas corpus in Maryland, ordered artillery placed on Federal Hill overlooking Baltimore, and worked to ensure the election of pro-Union state officials. Governor Thomas Holliday Hicks suspended the state legislature to prevent a secession vote.

  The most significant military engagement on Maryland soil came on the 17th of September, 1862, at the Battle of Antietam near Sharpsburg. Tactically the battle ended without a clear winner, but it was considered a strategic Union victory and a turning point of the war. A new state constitution in 1864 abolished slavery. In 1867, following constitutional amendments granting voting rights to freedmen, Maryland extended suffrage to non-white males. The Democratic Party rapidly reclaimed power and replaced the 1864 constitution with the Constitution of 1867. After Reconstruction ended in 1877, Democrats used physical intimidation, voter fraud, and eventually constitutional amendments to try to disenfranchise Black voters. Those efforts met sustained resistance: Black Marylanders and immigrant communities formed alliances that defeated disenfranchisement bills in 1905, 1907, and 1911. Black voters comprised 20 percent of the electorate, and immigrants comprised 15 percent, making it difficult for the legislature to craft restrictions that targeted Black voters without also disadvantaging immigrants.

• 5. Industry, Fire, and Reform

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  The Baltimore and Ohio Railroad, the first chartered railroad in the United States, opened its first section of track in 1830 between Baltimore and Ellicott City. By 1852, it had become the first rail line to reach the Ohio River from the eastern seaboard. That combination of port access and rail connectivity turned Baltimore into a major industrial city after the Civil War, drawing waves of European immigrant labor. Among the Baltimore businessmen who shaped the city during this period were Johns Hopkins, Enoch Pratt, George Peabody, and Henry Walters, each of whom founded institutions that still bear their names: a university, a library system, a music and dance conservatory, and an art museum.

  On a February night in 1904, fire broke out in the heart of Baltimore. It burned for more than 30 hours, destroyed 1,526 buildings, and swept across 70 city blocks. More than 1,231 firefighters worked to contain it. The Great Baltimore Fire reshaped the downtown, and within a few years the Progressive Era brought a different kind of reconstruction. Between 1892 and 1908, reformers pushed through standardized state-issued ballots, closed voting booths, primary elections, and candidate listings without party symbols. In 1902, Maryland regulated conditions in mines, outlawed child labor under the age of 12, mandated compulsory school attendance, and passed the nation's first workers' compensation law, though the courts overturned it before a revised version was enacted in 1910.

  World War I brought new military installations: Camp Meade, the Aberdeen Proving Ground, and the Edgewood Arsenal were established after the nation entered the war in 1917. After Georgia congressman William D. Upshaw criticized Maryland in 1923 for not passing Prohibition laws, Baltimore Sun editor Hamilton Owens coined the phrase Free State for Maryland in that context. H. L. Mencken then popularized it in a series of newspaper editorials, and the nickname took hold in a way that outlasted the Prohibition debate entirely.

• 6. A State Remade After 1945

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  In 1952, the Chesapeake Bay Bridge linked the eastern and western halves of Maryland for the first time, replacing a nearby ferry service. That single connection accelerated the transformation that was already reshaping the state. Suburban growth around Washington, D.C. and Baltimore gathered pace through the 1960s, replacing agricultural tracts with planned residential communities such as Columbia, St. Charles, and Montgomery Village. The Interstate Highway System spread across the state, most notably I-95, I-695, and the Capital Beltway, pulling travel patterns away from the old fall-line cities and toward the sprawling Baltimore-Washington corridor.

  Heavy manufacturing declined in Baltimore as the postwar decades passed. The steel industry at Sparrows Point, which had once included what was then the largest steel factory in the world, contracted under foreign competition, bankruptcies, and mergers. In Maryland's four westernmost counties, industrial, railroad, and coal-mining jobs fell away. Tobacco farming nearly vanished from Southern Maryland due to suburban development and a state tobacco buy-out program in the 1990s. In response, Baltimore launched urban renewal projects beginning in the 1960s with Charles Center and the Baltimore World Trade Center.

  What replaced the old industrial economy was a complex built around the federal government and its adjacent industries. Fort Meade now serves as headquarters for the Defense Information Systems Agency, United States Cyber Command, and the National Security Agency. The Johns Hopkins University and its medical research facilities are today the largest single employer in the Baltimore area. Maryland became the fourth-largest center for biotechnology in the United States, with more than 400 biotechnology companies located there. Institutions based in the state include the National Institutes of Health, the National Institute of Standards and Technology, the Food and Drug Administration, the J. Craig Venter Institute, and the Goddard Space Flight Center. The Bureau of Economic Analysis estimated Maryland's Gross State Product in 2025 at $568.1 billion.

• 7. The Bay and the Land It Shapes

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  Chesapeake Bay nearly bisects Maryland. Sixteen of the state's twenty-three counties, plus the city of Baltimore, border its tidal waters and the waters of its many tributaries. Combined, that network of shoreline totals more than 4,000 miles. The bay is so central to Maryland's identity that there has been periodic agitation to rename the state's official nickname from America in Miniature to the Bay State, though that name has long belonged to Massachusetts.

  The bay's ecology and economy have faced sustained pressure from development, and from fertilizer and livestock waste flowing into its waters. Maryland joined with neighboring states at the end of the 20th century to work on the bay's health. In April 2007, Maryland joined the Regional Greenhouse Gas Initiative, a collaborative effort among Northeastern states, Washington, D.C., and three Canadian provinces to reduce greenhouse gas emissions. In March 2017, Maryland became the first state with proven natural gas reserves to ban hydraulic fracturing by passing a law against it. Vermont had a similar law but no shale gas, and New York had issued a ban by executive order rather than legislation. In 2023, AES Corporation announced plans to retire the Warrior Run coal plant in June 2024, the state's last coal-fired power plant without an existing shutdown plan.

  The bay's waters still support significant commercial fishing. The largest catches by species are blue crab, oysters, striped bass, and menhaden. On Assateague Island, a population of feral horses believed to be descended from animals that escaped Spanish galleon shipwrecks survives in the coastal marshes. Every year during the last week of July, the horses are rounded up and swim across a shallow bay for sale at Chincoteague, Virginia, a practice that controls the island's population and was made famous by the children's book Misty of Chincoteague.

• 8. A Majority-Minority State

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  In 2019, non-Hispanic white Americans fell to 49.8 percent of Maryland's population, making it a majority-minority state. By 2020, African Americans made up 31.1 percent of the population. Maryland has the highest percentage of residents born in Africa of any state, with large communities of Nigerian, Ethiopian, Eritrean, Kenyan, Cameroonian, and Ghanaian immigrants. The Washington metropolitan area holds the world's largest population of Ethiopians outside Ethiopia. The Ethiopian community in greater Washington, D.C., historically concentrated in the Adams Morgan and Shaw neighborhoods, has grown outward into Silver Spring and the Maryland suburbs.

  Salvadorans form the largest Hispanic group in Maryland, and Maryland has the highest percentage of Salvadoran residents of any state. The D.C. area has the highest percentage of Salvadorans of any American metro area, with particular concentrations in Prince George's and Montgomery counties. Indian Americans are the largest Asian group in Maryland at 1.7 percent of the population, with large communities in Montgomery and Howard counties. Maryland has one of the largest populations of Nepali Americans in the country, estimated at between 20,000 and 25,000, many of them refugees who sought asylum after expulsion from Bhutan or in the wake of the 2015 Nepal earthquake. The first Nepali American elected to a state legislature, Harry Bhandari, was elected in Maryland, representing part of Baltimore County.

  Maryland's history on civil rights for LGBT residents has moved through sharp reversals and steady progress. The first person known to describe himself as a drag queen was William Dorsey Swann, born enslaved in Hancock, Maryland, who also became the first American on record to pursue legal and political action defending the right of LGBTQ people to assemble. On the 1st of March, 2012, Governor Martin O'Malley signed a freedom-to-marry bill into law. Opponents placed the measure on the ballot as Question 6 in November 2012. Voters upheld it with 52 percent to 48 percent, and same-sex couples began marrying in Maryland on the 1st of January, 2013. Protection against discrimination based on gender identity was added in 2014, conversion therapy was banned in 2018, and the gay panic defense was abolished in 2021.