Hammond is the largest city in Tangipahoa Parish, Louisiana, United States, located 45 miles (72 km) east of Baton Rouge and 45 miles (72 km) northwest of New Orleans. Its population was 20,019 in the 2010 census. Hammond is home to Southeastern Louisiana University and is the principal city of the Hammond Metropolitan Statistical Area, which includes all of Tangipahoa Parish.
The city is named for Peter Hammond (1798–1870), the surname anglicized from Peter av Hammerdal (Peter of Hammerdal) — a Swedish immigrant who first settled the area around 1818. Peter, a sailor, had been briefly imprisoned by the British at Dartmoor Prison during the Napoleonic Wars. He escaped during a prison riot, made his way back to sea, and later on arrived in New Orleans. Hammond used his savings to buy then-inexpensive land northwest of Lake Pontchartrain. There, he started a plantation to cultivate trees, which he made into masts, charcoal, and other products for the maritime industry in New Orleans. He transported the goods by oxcart to the head of navigation on the Natalbany River at Springfield. He owned at least 30 slaves before the Civil War.