NWPA may refer to:

• Navigable Waters Protection Act, now known as the Navigation Protection Act, an 1882 Canadian law that regulated development affecting waterways
• Nuclear Waste Policy Act, a 1982 U.S. federal law which established a program for the disposal of radioactive waste

• Opposition to Christianity in Chazalic literature
• Opposition to Christianity in Rabbinic literature
• Opposition to Christian Sabbatarianism
• Opposition to circumcision
• Opposition to circumcison
• Opposition to Cuba's Socialist Government
• Opposition to democracy
• Opposition to Fidel Castro
• Opposition to initiatory coercion
• Opposition to Judaism among the Christian church fathers
• Opposition to Maryland Route 200
• Opposition to metrication
• Opposition to military action against iran
• Opposition to promotion of homosexuality
• Opposition to same-sex marriage in the United States
• Opposition to slavery
• Opposition to Tawassul
• Opposition to the 2001 Afghanistan War
• Opposition to the american civil war
• Opposition to the Indo-US civilian agreement in India
• Opposition to the iraq war
• Opposition to the Israeli Occupation in the United States
• Opposition to the overthrow of the Kingdom of Hawaii
• Opposition to the Poor Law
• Opposition to the poor law