NH 1B may refer to:

• National Highway 1B (India, old numbering)
• New Hampshire Route 1B, United States

• Legislative Bill Drafting Commission
• Legislative Body of France
• Legislative Branch Appropriations Act, 2015
• Legislative branch of government
• Legislative branch of the government of Puerto Rico
• Legislative Chamber
• Legislative Chamber of the Federal District
• Legislative Chamber (Uzbekistan)
• Legislative commission (Puerto Rico)
• Legislative Council
• Legislative Council (Amendment) Bill 2012
• Legislative Council (British Guiana)
• Legislative Council Building
• Legislative Council Complex
• Legislative Council (Fiji)
• Legislative Council for Prince Edward Island
• Legislative Council (Isle of Man)
• Legislative Council (Nyasaland)
• Legislative Council of Barbados
• Legislative Council of Bihar
• Legislative Council of British Burma
• Legislative Council of Burma
• Legislative Council of Nyasaland
• Legislative Council of the Territory of Florida
• Legislative Council of Western Australia