Places in New Castle County

Please see our Maps section for historic maps and information about Delaware Hundreds.

• Bellefonte: Incorporated in 1915.
• Clayton: Incorporated in 1887. Located in Kent and New Castle counties.
• Delaware City: Extablished circa 1801.
• Elsmere: Established in 1886.
• Fort Casimir: Established in 1651 (Dutch). Renamed Fort Trinity (Trefaldighets) in 1654 (Swedish). Renamed Neiuw Amstel (New Amstel) in 1655 (Dutch). Renamed as New Castle on 1694 (English).
• Fort Christina: Established in 1638. First permanent European settlement (Swedish). Now Wilmington.
• Fort Trinity (Trefaldighets). See Fort Casimir
• Middletown: Incorporated in 1861.
• Neiuw Amstel (New Amstel): See Fort Casimir.
• New Castle: See Fort Casimir.
• Newark: Founded in 1758.
• Newport: Incorporated in 1873.
• Odessa: Established in 1731.
• Smyrna: Established circa 1755.
• Townsend: Incorporated in 1885.
• Wilmington: See Fort Christina. Named by William Penn for Spencer Compton, Earl of Wilmington.