The map above shows Massachusetts and Washington side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs Washington Geography
Land area
- Massachusetts has a land area of 7,801 square miles (20,204 km²), while Washington has 66,455 square miles (172,119 km²).
- Washington's land area is 8.5 times (752%) larger than Massachusetts'.
Total area
- Massachusetts: 10,554 square miles (27,335 km²) vs Washington: 71,301 square miles (184,668 km²), including inland and coastal water.
- Washington's total area is 6.8 times (576%) larger than Massachusetts'.
Length
- Massachusetts is 123 miles (198 km) long from north to south; Washington is 238 miles (383 km).
- Washington's north-south length is 1.9 times (93%) longer than Massachusetts'.
Width
- Massachusetts spans 185 miles (297 km) east to west; Washington spans 399 miles (641 km).
- Washington's east-west width is 2.2 times (116%) wider than Massachusetts'.
Highest point
- Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); Washington's is Mount Rainier at 14,409 feet (4,392 m).
- Mount Rainier is 10,920 feet higher than Mount Greylock.
Lowest point
- Massachusetts's lowest point is Atlantic Ocean at 0 feet; Washington's is Pacific Ocean at 0 feet.
- Both lowest points are at or near sea level.
Massachusetts vs Washington Population and History
Population
- Massachusetts has a population of 7,136,171 (2024), while Washington has 7,958,180 (2024).
- Washington's population is 1.1 times (12%) larger than Massachusetts'.
Population density
- Massachusetts: 914.8 people per square mile vs Washington: 119.8.
- Massachusetts' population density is 7.6 times (664%) higher than Washington's.
Biggest city
- Massachusetts's biggest city is Boston with 673,458 people; Washington's is Seattle with 780,995.
- Seattle's population is 1.2 times (16%) larger than Boston's.
Largest metro area
- Massachusetts's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs Washington's Seattle-Tacoma-Bellevue, WA metro area (4,145,494).
- Boston-Cambridge-Newton, MA-NH metro area's population is 1.2 times (21%) larger than Seattle-Tacoma-Bellevue, WA metro area's.
History
- Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state.
- Washington: Admitted to the Union on November 11, 1889, as the 42nd state.
- In its current form, Massachusetts is the older of the two by 101 years.
Massachusetts vs Washington Economy
GDP
- Massachusetts's GDP is $778.5 billion (2024) vs Washington's $856.0 billion.
- Washington's economic output is 1.1 times (10%) larger than Massachusetts'.
GDP per capita
- Massachusetts: $109,095 per person vs Washington: $107,564.
- Massachusetts and Washington have about the same GDP per capita.
Average income
- Massachusetts: $93,607 vs Washington: $85,187 average income per person (per capita personal income).
- Massachusetts' average income is 1.1 times (10%) higher than Washington's.
Massachusetts vs Washington Counties
Number of counties
- Massachusetts has 14 counties, while Washington has 39.
- Washington's county count is 2.8 times (179%) higher than Massachusetts'.
Biggest county by area
- Massachusetts's largest county is Worcester County at 1,511 square miles; Washington's is Okanogan County at 5,266 square miles.
- Okanogan County's land area is 3.5 times (249%) larger than Worcester County's.
Smallest county by area
- Massachusetts: Nantucket County (46 sq mi) vs Washington: San Juan County (174 sq mi).
- San Juan County's land area is 3.8 times (276%) larger than Nantucket County's.
Most populous county
- Massachusetts: Middlesex County (1,668,956 people) vs Washington: King County (2,340,211 people).
- King County's population is 1.4 times (40%) larger than Middlesex County's.
Least populous county
- Massachusetts: Nantucket County (14,670 people) vs Washington: Garfield County (2,404 people).
- Nantucket County's population is 6.1 times (510%) larger than Garfield County's.
Richest county
- Massachusetts: Nantucket County ($129,250 per capita income) vs Washington: King County ($128,684).
- Nantucket County and King County have about the same income.
Poorest county
- Massachusetts: Hampshire County ($65,432 per capita income) vs Washington: Ferry County ($50,456).
- Hampshire County's income is 1.3 times (30%) richer than Ferry County's.
Massachusetts vs Washington Taxes
State income tax
- Massachusetts has a top income tax rate of 9%, while Washington has a 9% tax on capital gains only.
Property tax
- Massachusetts: 1% effective rate vs Washington: 0.79% of home value per year.
- Massachusetts's rate is 0.21 percentage points higher.
Sales tax
- Massachusetts: 6.25% combined state and average local rate vs Washington: 9.57%.
- Washington's combined rate is 3.32 percentage points higher.
Official Websites
Massachusetts official website · Washington official website
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More Size Comparisons
All Massachusetts size comparisons · All Washington size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.