Nicholas James Vujicic is an Australian American Christian evangelist and motivational speaker of Serbian descent. Vujicic has tetra-amelia syndrome, a disorder characterised by the absence of arms and legs.

Nick Warburton is a British screenwriter and playwright. He has written stage plays, television and radio scripts for series including Doctors, Holby City and EastEnders.

Nickolas Butler is an American novelist and short story author. He is the author of four novels: Shotgun Lovesongs (2014), The Hearts of Men (2017), Little Faith (2019), and Godspeed (2021). He also authored the short story collection Beneath the Bonfire (2015).

Nicky Hayes is an established psychologist and author, who has written over 25 books on psychology, management and neuroscience and made significant contributions to psychology education, research methods and applied psychology.

Li Chung Ping (李崇萍), who writes under the pseudonym Nicky Lee, is a popular Taiwanese manhua author. She writes primarily for the teenage girl market, specializing in comedy, drama and romance.

Nicky Pellegrino is a novelist. She is an English-born New Zealander of Italian descent and lives and writes in Auckland, New Zealand. Her novels have been translated into 12 languages.

Nicky Silver is an American playwright. Formerly of Philadelphia, he resides in London. Many of his plays have been produced off-Broadway, and also at the Woolly Mammoth Theatre Company in Washington, D.C.

Nico Stehr was "Karl Mannheim Professor for Cultural Studies" at the Zeppelin University in Friedrichshafen / Germany and Founding Director of the European Center for Sustainability Research.

Nicola Abbagnano was an Italian existential philosopher.

Nicola Acocella is an Italian economist and academic, Emeritus Professor of Economic Policy since 2014.