The map above shows Indiana and Maryland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Indiana vs Maryland Geography
Land area: Indiana has a land area of 35,825 square miles (92,787 km²), while Maryland has 9,711 square miles (25,151 km²). Indiana's land area is 3.7 times (269%) larger than Maryland's.
Total area: Indiana: 36,421 square miles (94,331 km²) vs Maryland: 12,406 square miles (32,131 km²), including inland and coastal water. Indiana's total area is 2.9 times (194%) larger than Maryland's.
Length: Indiana is 276 miles (444 km) long from north to south; Maryland is 231 miles (371 km). Indiana's north-south length is 1.2 times (19%) longer than Maryland's.
Width: Indiana spans 193 miles (310 km) east to west; Maryland spans 243 miles (391 km). Maryland's east-west width is 1.3 times (26%) wider than Indiana's.
Highest point: Indiana's highest point is Hoosier Hill at 1,255 feet (383 m); Maryland's is Hoye-Crest at 3,362 feet (1,025 m). Hoye-Crest is 2,107 feet higher than Hoosier Hill.
Lowest point: Indiana's lowest point is Ohio River at 330 feet; Maryland's is Atlantic Ocean at 0 feet. Maryland's lowest point is 330 feet lower.
Indiana vs Maryland Population and History
Population: Indiana has a population of 6,924,275 (2024), while Maryland has 6,263,220 (2024). Indiana's population is 1.1 times (11%) larger than Maryland's.
Population density: Indiana: 193.3 people per square mile vs Maryland: 645.0. Maryland's population density is 3.3 times (234%) higher than Indiana's.
Biggest city: Indiana's biggest city is Indianapolis with 891,484 people; Maryland's is Baltimore with 568,271. Indianapolis' population is 1.6 times (57%) larger than Baltimore's.
Largest metro area: Indiana's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Maryland's Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489). Chicago-Naperville-Elgin, IL-IN metro area's population is 1.5 times (46%) larger than Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's.
History: Indiana: Admitted to the Union on December 11, 1816, as the 19th state. Maryland: Admitted to the Union on April 28, 1788, as the 7th state. In its current form, Maryland is the older of the two by 28 years.
Indiana vs Maryland Economy
GDP: Indiana's GDP is $519.5 billion (2024) vs Maryland's $546.0 billion. Maryland's economic output is 1.1 times (5%) larger than Indiana's.
GDP per capita: Indiana: $75,028 per person vs Maryland: $87,180. Maryland's GDP per capita is 1.2 times (16%) higher than Indiana's.
Average income: Indiana: $64,077 vs Maryland: $79,259 average income per person (per capita personal income). Maryland's average income is 1.2 times (24%) higher than Indiana's.
Indiana vs Maryland Counties
Number of counties: Indiana has 92 counties, while Maryland has 24. Indiana's county count is 3.8 times (283%) higher than Maryland's.
Biggest county by area: Indiana's largest county is Allen County at 657 square miles; Maryland's is Frederick County at 661 square miles. Allen County and Frederick County have about the same land area.
Smallest county by area: Indiana: Ohio County (86 sq mi) vs Maryland: Baltimore city (81 sq mi). Ohio County's land area is 1.1 times (7%) larger than Baltimore city's.
Most populous county: Indiana: Marion County (981,628 people) vs Maryland: Montgomery County (1,082,273 people). Montgomery County's population is 1.1 times (10%) larger than Marion County's.
Least populous county: Indiana: Ohio County (5,996 people) vs Maryland: Kent County (19,557 people). Kent County's population is 3.3 times (226%) larger than Ohio County's.
Richest county: Indiana: Hamilton County ($104,283 per capita income) vs Maryland: Montgomery County ($104,882). Hamilton County and Montgomery County have about the same income.
Poorest county: Indiana: Miami County ($44,940 per capita income) vs Maryland: Somerset County ($41,421). Miami County's income is 1.1 times (8%) richer than Somerset County's.
Indiana vs Maryland Taxes
State income tax: Indiana has a top income tax rate of 2.95%, while Maryland has a top income tax rate of 6.5%. Maryland's top rate is 3.55 percentage points higher.
Property tax: Indiana: 0.74% effective rate vs Maryland: 0.95% of home value per year. Maryland's rate is 0.21 percentage points higher.
Sales tax: Indiana: 7% combined state and average local rate vs Maryland: 6%. Indiana's combined rate is 1 percentage points higher.
Official Websites
Indiana official website · Maryland official website
More Size Comparisons
All Indiana size comparisons · All Maryland 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.