Delaware, located in the Mid-Atlantic region, is known as the “First State” because it was the first to ratify the U.S. Constitution. With a population of about 1 million people, Delaware’s capital is Dover, but Wilmington is its largest city and financial hub.
10 Largest Cities in Delaware
1. Wilmington (Delaware)
City Facts
- County: New Castle County
- Area: 17.0 square miles
- Population: 70,750 (2023 estimate)
- Area Code: 302
- Zip Codes: 19801-19810
- Latitude: 39.739073
- Longitude: -75.539787
Location and History:
Wilmington is located in northern Delaware, at the confluence of the Christina and Delaware Rivers, just 25 miles southwest of Philadelphia. It was founded in 1638 by Swedish settlers as Fort Christina, the first Swedish settlement in North America. The area later came under Dutch and English control, with Wilmington officially incorporated in 1739. Wilmington’s location along the Delaware River made it a key industrial and commercial hub during the 19th century, especially for shipbuilding and manufacturing. Today, it remains Delaware’s largest city and a major financial center, home to numerous banks and credit card companies.
Major Landmarks:
- Grand Opera House: A historic theater hosting concerts, performances, and cultural events.
- Brandywine Park: A large park along the Brandywine River, featuring gardens, walking trails, and the Brandywine Zoo.
- Delaware Art Museum: Known for its extensive collection of American art and illustrations.
- Rodney Square: A central public square surrounded by important city landmarks, including the Hotel DuPont and the Wilmington Public Library.
Major Highways:
Wilmington is served by several major highways, including Interstate 95, which runs north-south through the city, connecting it to Philadelphia and Baltimore. Interstate 495 bypasses the downtown area, providing additional north-south access along the Delaware River. U.S. Route 13 and U.S. Route 202 run through Wilmington, offering connections to nearby towns and cities. These highways make Wilmington a crucial transportation hub for the Mid-Atlantic region.
2. Dover (Delaware)
City Facts
- County: Kent County
- Area: 23.15 square miles
- Population: 39,408 (2023 estimate)
- Area Code: 302
- Zip Codes: 19901-19906
- Latitude: 39.158169
- Longitude: -75.524368
Location and History:
Dover, the capital of Delaware, is located in central Delaware along the St. Jones River. It was founded in 1683 by William Penn and became the state capital in 1777 due to its central location. Dover’s history is closely tied to its role as a governmental center, and the city played a significant part in early American politics. Dover’s economy historically relied on agriculture, but it has diversified into manufacturing, government, and education sectors, with Dover Air Force Base being a significant presence. The city is also known for its role in the automotive industry, with the Dover International Speedway hosting major NASCAR events.
Major Landmarks:
- Dover International Speedway: A major NASCAR racetrack, nicknamed “The Monster Mile.”
- First State Heritage Park: Delaware’s first urban “park without boundaries,” offering historic walking tours of downtown Dover.
- Old State House: A historic government building that once served as Delaware’s Capitol.
- John Dickinson Plantation: The home of John Dickinson, a Founding Father known as the “Penman of the Revolution.”
Major Highways:
Dover is served by Delaware Route 1, which runs north-south through the city, connecting it to Wilmington in the north and the beach resorts of Sussex County in the south. U.S. Route 13 also runs parallel to Route 1, serving as a local access route. Delaware Route 8 runs east-west, providing connections to nearby towns. These highways facilitate easy travel to and from the state’s capital, making Dover a regional transportation hub.
3. Newark (Delaware)
City Facts
- County: New Castle County
- Area: 9.4 square miles
- Population: 33,849 (2023 estimate)
- Area Code: 302
- Zip Codes: 19702, 19711-19718
- Latitude: 39.683722
- Longitude: -75.749657
Location and History:
Newark is located in northern Delaware, near the Maryland border. It was founded in 1694 by Scots-Irish and Welsh settlers and developed as an agricultural center. Newark’s growth accelerated with the establishment of the University of Delaware in 1833, making it a prominent college town. The university is now one of the city’s largest employers and has played a key role in Newark’s cultural and economic development. Newark has also developed strong manufacturing and research sectors, contributing to its reputation as a hub of innovation and education in Delaware.
Major Landmarks:
- University of Delaware: A major public research university with a historic campus at the heart of Newark.
- White Clay Creek State Park: Offering hiking, biking, and fishing along the White Clay Creek.
- Iron Hill Museum: A local history museum showcasing Native American artifacts and local geology.
- Main Street: A vibrant downtown area with shops, restaurants, and cultural venues.
Major Highways:
Newark is connected by Interstate 95, which runs just north of the city, providing easy access to Philadelphia, Baltimore, and Wilmington. Delaware Route 896 runs north-south through the city, connecting it to Maryland and other parts of Delaware. U.S. Route 40 runs east-west, linking Newark to Elkton, Maryland, and nearby communities. These highways support the city’s role as an educational and research hub with strong regional connections.
4. Middletown (Delaware)
City Facts
- County: New Castle County
- Area: 11.5 square miles
- Population: 24,753 (2023 estimate)
- Area Code: 302
- Zip Codes: 19709
- Latitude: 39.449045
- Longitude: -75.716314
Location and History:
Middletown is located in southern New Castle County, about halfway between Wilmington and Dover, hence its name. Originally a small agricultural town, Middletown experienced rapid growth in the late 20th and early 21st centuries due to suburban development. The town’s convenient location near major highways and its proximity to both Philadelphia and Baltimore has made it a popular place for new residential and commercial developments. Middletown is known for its blend of historic charm and modern amenities, making it one of the fastest-growing cities in Delaware.
Major Landmarks:
- Silver Lake Park: A recreational park offering fishing, boating, and walking trails.
- Middletown Historical Society Museum: Preserving the town’s rich agricultural and railroad history.
- The Everett Theatre: A historic theater that hosts live performances, films, and community events.
- Cedar Lane Regional Park: A large park with sports fields, playgrounds, and trails.
Major Highways:
Middletown is served by Delaware Route 1, a major north-south route that connects the town to Wilmington and the beaches of Sussex County. U.S. Route 301 also runs through Middletown, providing a direct connection to Maryland and the Chesapeake Bay area. Delaware Route 299 offers local access, running through the heart of the town. These highways make Middletown a key commuter town for people working in nearby cities.
5. Smyrna (Delaware)
City Facts
- County: Kent County / New Castle County
- Area: 6.56 square miles
- Population: 13,450 (2023 estimate)
- Area Code: 302
- Zip Codes: 19977
- Latitude: 39.299835
- Longitude: -75.604932
Location and History:
Smyrna is located on the border of New Castle and Kent counties, just north of Dover. Originally settled in the early 1700s, it was known as Duck Creek Village before being renamed Smyrna in 1806. The town thrived as an agricultural and shipping center, particularly during the 19th century, when the Smyrna River provided access to the Delaware River and the broader Atlantic trade routes. Today, Smyrna is a growing town with a mix of historic buildings and new developments, serving as a suburban community for both Dover and Wilmington.
Major Landmarks:
- Smyrna Museum: A local history museum that offers exhibits on the town’s development and cultural heritage.
- Lake Como: A man-made lake that provides opportunities for swimming, boating, and picnicking.
- Smyrna Opera House: A historic venue that hosts live performances, art exhibits, and community events.
- Big Oak Park: A popular park with sports facilities, playgrounds, and walking trails.
Major Highways:
Smyrna is situated along U.S. Route 13, which runs north-south through the town, providing access to Dover and Wilmington. Delaware Route 1 bypasses the town to the east, offering a faster route to the beach resorts in Sussex County. Delaware Route 300 connects Smyrna to nearby towns and rural areas, making the town an important regional hub for transportation and commerce.
6. Milford (Delaware)
City Facts
- County: Kent County / Sussex County
- Area: 9.87 square miles
- Population: 12,278 (2023 estimate)
- Area Code: 302
- Zip Codes: 19963
- Latitude: 38.912483
- Longitude: -75.429110
Location and History:
Milford is located in both Kent and Sussex counties, at the geographic center of Delaware. The town was founded in 1787 by Joseph Oliver, a shipbuilder who established a shipyard along the Mispillion River. Milford quickly became a center for shipbuilding, grain milling, and commerce. The arrival of the railroad in the 19th century spurred further growth, making Milford a significant hub for agriculture and industry. Today, Milford continues to expand as a commercial and residential center, with a mix of historic charm and modern amenities.
Major Landmarks:
- Mispillion Riverwalk: A scenic pathway along the Mispillion River, featuring parks, sculptures, and historical sites.
- Parson Thorne Mansion: A historic home dating back to the 1730s, now serving as a museum.
- Milford Museum: Showcasing local history, including Milford’s shipbuilding and agricultural heritage.
- Abbott’s Mill Nature Center: A nature preserve offering trails, environmental education, and a historic grist mill.
Major Highways:
Milford is served by U.S. Route 113, which runs north-south through the town, providing access to Dover and the beaches of southern Delaware. Delaware Route 1 is located just east of Milford, offering a faster route to Wilmington and Rehoboth Beach. Delaware Route 14 runs east-west through the town, connecting Milford to Harrington and the coastal areas. These highways support Milford’s role as a growing residential and commercial center.
7. Seaford (Delaware)
City Facts
- County: Sussex County
- Area: 5.61 square miles
- Population: 8,697 (2023 estimate)
- Area Code: 302
- Zip Codes: 19973
- Latitude: 38.641500
- Longitude: -75.611130
Location and History:
Seaford is located in southwestern Delaware along the Nanticoke River. It was established in the early 1800s and developed as a major shipping and agricultural center due to its proximity to the Chesapeake Bay. Seaford became known for its thriving canning industry, particularly for tomatoes and other produce. In the mid-20th century, Seaford was home to the DuPont nylon plant, the first of its kind in the world, which contributed significantly to the town’s economy. Today, Seaford retains its agricultural roots while continuing to grow as a small city with a vibrant community.
Major Landmarks:
- Nanticoke River: A scenic waterway offering boating, fishing, and riverfront parks.
- Seaford Museum: A local history museum housed in a former post office building.
- Governor Ross Mansion and Plantation: A historic mansion and plantation that offers tours and educational programs.
- Seaford Sports Complex: A community park with sports fields, playgrounds, and walking paths.
Major Highways:
Seaford is located along U.S. Route 13, which runs north-south through the town, connecting it to Salisbury, Maryland, and Dover. Delaware Route 20 provides east-west access to other parts of Sussex County and nearby beach towns. Delaware Route 18 connects Seaford to Bridgeville and Georgetown, further supporting the town’s agricultural and commercial activities.
8. Georgetown (Delaware)
City Facts
- County: Sussex County
- Area: 4.03 square miles
- Population: 7,582 (2023 estimate)
- Area Code: 302
- Zip Codes: 19947
- Latitude: 38.690113
- Longitude: -75.385768
Location and History:
Georgetown, located in the heart of Sussex County, was founded in 1791 as the county seat. The town was deliberately established inland to provide a more central location for county residents, making it an important administrative and legal center. Georgetown is known for its circular town square and its annual Return Day, a post-election tradition dating back to 1792. The town’s economy has historically been based on agriculture, particularly poultry farming, and it has grown as a regional hub for government, education, and commerce.
Major Landmarks:
- The Circle: Georgetown’s historic town square, surrounded by government buildings and shops.
- Return Day Parade: A unique biennial event where political opponents symbolically “bury the hatchet” after elections.
- Marvel Carriage Museum: Featuring historic carriages and local artifacts from Georgetown’s past.
- Sussex County Courthouse: A historic courthouse that remains a focal point of Georgetown’s legal and governmental activities.
Major Highways:
Georgetown is served by U.S. Route 113, a major north-south route that connects the town to Milford and the southern beaches. Delaware Route 404 provides east-west access to Maryland and the Delaware coast, making Georgetown an important crossroads for regional traffic. Delaware Route 9 runs northeast to Lewes, providing access to the coastal areas of Sussex County. These highways make Georgetown a key administrative and commercial center in southern Delaware.
9. Elsmere (Delaware)
City Facts
- County: New Castle County
- Area: 1.03 square miles
- Population: 6,220 (2023 estimate)
- Area Code: 302
- Zip Codes: 19805
- Latitude: 39.740813
- Longitude: -75.601266
Location and History:
Elsmere is located just west of Wilmington in New Castle County. It was founded in the early 20th century as a suburban community for workers employed in Wilmington’s booming industries. The town grew quickly as an affordable place to live for those commuting to Wilmington, with many of its original homes built in the “company town” style common to industrial suburbs. Today, Elsmere remains a primarily residential community with easy access to Wilmington, offering a small-town atmosphere near Delaware’s largest city.
Major Landmarks:
- Elsmere Library: A community library offering educational programs and resources for residents.
- Vilone Park: A popular park featuring playgrounds, sports fields, and picnic areas.
- Elsmere Fire Company: A historic fire company that serves as a pillar of the local community.
- Elsmere Veterans Memorial Park: A memorial dedicated to local veterans who served in the U.S. military.
Major Highways:
Elsmere is located near Interstate 95, which provides direct access to Wilmington, Philadelphia, and other major cities along the East Coast. Delaware Route 2 runs through the town, offering a connection to Newark and downtown Wilmington. Delaware Route 141 provides a nearby loop around the western suburbs of Wilmington. These highways make Elsmere a convenient suburb for commuters while offering easy access to regional transportation routes.
10. New Castle (Delaware)
City Facts
- County: New Castle County
- Area: 3.02 square miles
- Population: 5,551 (2023 estimate)
- Area Code: 302
- Zip Codes: 19720
- Latitude: 39.662778
- Longitude: -75.566667
Location and History:
New Castle is located in northern Delaware along the banks of the Delaware River. It was founded in 1651 by the Dutch under the name Fort Casimir. Later, it was taken over by the British and became one of Delaware’s most important colonial towns. New Castle served as the state capital before the capital moved to Dover in the late 18th century. The town is known for its well-preserved colonial architecture and historic sites, making it a popular destination for tourists interested in early American history.
Major Landmarks:
- Old New Castle Courthouse: A historic courthouse where Delaware’s separation from Pennsylvania was declared in 1776.
- Battery Park: A waterfront park offering scenic views of the Delaware River and walking trails.
- Amstel House Museum: A restored colonial mansion offering tours and exhibits on New Castle’s early history.
- New Castle Historic District: A well-preserved area with buildings dating back to the 1600s, showcasing colonial and Federal-style architecture.
Major Highways:
New Castle is located near Interstate 95 and Interstate 295, both of which provide quick access to Wilmington, Philadelphia, and New Jersey. Delaware Route 9 runs through the town, following the Delaware River and offering a scenic route to Wilmington and Dover. U.S. Route 13 also passes nearby, providing local access to other parts of New Castle County. These highways make New Castle easily accessible for both residents and tourists interested in its historic sites.