Nils Ludvig Arppe (19 December 1804 — 9 December 1861) was a Finnish industrialist.
Arppe studied jurisprudence but returned in his home area leading a sawmill together with his brother-in-law Johan Fabritius.
Eventually he owned many sawmills and owned large forest areas.
Due to economical regulation of forest resources, he started processing iron from local limonite resources.
In 1832 Arppe built the first steamship of Finland.
He also made experiments with forestry and agricultural methods.
Arppe was married for three times and got altogether eleven children.
Arppe's business led to development of Wärtsilä company.