MA is the two-letter postal abbreviation for Massachusetts, officially the Commonwealth of Massachusetts. It sits in the northeastern United States, in the New England region, and was the sixth state to ratify the U.S. Constitution in 1788. Roughly 7.15 million people live there, the economy produces about $781 billion a year, and the state punches well above its size on the national stage despite ranking seventh-smallest by land area.
Where the Abbreviation Comes From
The code dates to October 1963. When the U.S. Post Office Department launched five-digit ZIP codes that July, addressing equipment could only fit 23 characters on the bottom line of an envelope. Every state name had to compress to exactly two letters, and Massachusetts became MA.1U.S. Postal Service. State Abbreviations
The “Commonwealth” part is much older than the postal code and older than the federal government itself. The Massachusetts Constitution, drafted primarily by John Adams and ratified in 1780, declared the people of the former Province of Massachusetts Bay a “free, sovereign, and independent body politic, or state by the name of THE COMMONWEALTH OF MASSACHUSETTS.”2General Court of Massachusetts. Massachusetts Constitution Adams likely chose the word for its anti-monarchical flavor, framing government as something that exists to serve the common good. Three other states carry the same designation: Kentucky, Pennsylvania, and Virginia. Legally it changes nothing. Commonwealths have the same powers and obligations as any other state.3Library of Congress. What’s in a Name? The Four U.S. States That Are Technically Commonwealths
Geography and Population
Massachusetts borders the Atlantic Ocean and the Gulf of Maine to the east, New Hampshire and Vermont to the north, New York to the west, and Connecticut and Rhode Island to the south. The land shifts from a flat coastal plain in the east to rolling hills through the middle and the Berkshire Mountains in the west. Deep bays indent the coastline, which is why the state is nicknamed “the Bay State.”
Population reached roughly 7.15 million in 2025, the largest in New England and among the densest in the country. Most residents live in the eastern half of the state, concentrated in the Greater Boston metropolitan area. Boston is both the capital and the largest city, followed by Worcester, Springfield, and Cambridge.
Why Massachusetts Matters Historically
Few states shaped the founding of the country as directly. The Pilgrims landed at Plymouth in 1620 and established Plymouth Colony, one of the earliest successful English settlements in North America. Puritan colonists founded the Massachusetts Bay Colony around present-day Boston a decade later. Both experimented with forms of self-governance that fed into the democratic traditions the nation later adopted.
By the 1770s, Massachusetts had become the center of colonial resistance to British rule. The Boston Massacre in 1770 and the Boston Tea Party in 1773 pushed tensions to a breaking point. When British troops marched toward Lexington and Concord in April 1775, the fighting that broke out launched the Revolutionary War. Massachusetts ratified the U.S. Constitution on February 6, 1788, as the sixth state to do so.
The Modern Economy
Massachusetts has one of the most productive state economies in the country, with a gross domestic product of about $781 billion, ranking 12th nationally. The old base of agriculture, fishing, and textile manufacturing has long since given way to higher-value industries.
Biotechnology and healthcare anchor the modern economy. The corridor between Boston and Cambridge is one of the world’s densest clusters of biotech firms, pharmaceutical companies, and research hospitals. Technology is the other pillar, with concentrations in cybersecurity, artificial intelligence, and software. Financial services and higher education round out the mix. The state’s universities feed graduates directly into these industries, and the research partnerships between schools and nearby companies are a big reason the sectors keep growing.
Taxes
Massachusetts charges a flat 5% income tax on most personal income for the 2026 tax year.4Commonwealth of Massachusetts Department of Revenue. Massachusetts Circular M Income Tax Withholding Tables at 5.0% Effective January 1, 2026 An additional 4% surtax applies only to the portion of taxable income above $1,107,750 in 2026, a threshold that adjusts annually for inflation.5Commonwealth of Massachusetts. Massachusetts 4% Surtax on Taxable Income
The sales tax is 6.25% on tangible personal property and certain services, applied uniformly statewide with no local add-ons.6Commonwealth of Massachusetts. Sales and Use Tax for Businesses
Massachusetts also levies its own estate tax with an exemption of $2 million, far below the federal exemption of $15 million per individual for 2026. Estates valued at $2 million or less get a credit of up to $99,600 that wipes out the state tax, but larger estates owe the remaining balance. Because of the gap between state and federal thresholds, many families owe Massachusetts estate tax even when they owe nothing to the IRS.7Commonwealth of Massachusetts. FAQs: New Estate Tax Changes
Wages, Leave, and Housing
The state minimum wage is $15.00 per hour. That rate took effect in January 2023 as the last step of a five-year phased increase, and no further automatic increases are currently scheduled. Tipped workers earning more than $20 per month in tips have a service rate of $6.75 per hour, and employers must make up the difference if tips don’t bring total pay to $15.00.8Commonwealth of Massachusetts. Massachusetts Law About Minimum Wage
Massachusetts runs a Paid Family and Medical Leave program covering most workers in the state. The total contribution rate for 2026 is 0.88% of eligible wages, and the maximum weekly benefit is $1,230.39.9Commonwealth of Massachusetts. Paid Family and Medical Leave (PFML) Overview and Benefits
Housing is where the cost of living bites hardest. The average home value statewide was about $642,000 as of early 2026, and listings typically go under contract within roughly three weeks. Greater Boston is the most expensive market, but even Worcester and Springfield sit well above national medians. Wages in Massachusetts are among the highest in the country, which partially offsets the cost pressure, but residents still need to budget carefully.
Education and Culture
Massachusetts is home to some of the most recognized educational institutions in the world, including Harvard University (founded in 1636 as the first college in what is now the United States) and the Massachusetts Institute of Technology. Dozens of other colleges and universities cluster across the state, giving it an academic density that shapes both the local culture and the workforce.
Boston is a major performing arts hub, with internationally known orchestras, theaters, and museums. The state has produced or hosted an outsized share of influential American writers and thinkers, from the 19th-century Transcendentalists onward, and has a long tradition of political progressivism, often adopting social policies years before other states follow. Historical sites from Plymouth Rock to the Freedom Trail continue to draw visitors and keep the state’s role in the founding of the country visible on the ground.