Nonaka (written: 野中 literally "in the middle of a field") is a Japanese surname. Notable people with the surname include:
Ai Nonaka (野中 藍) (born 1981), Japanese voice actressEmi Nonaka (野中 絵美) (born 1984), Japanese ice hockey playerHiromu Nonaka (野中 広務) (born 1925), Japanese politicianIkujiro Nonaka (野中 郁次郎) (born 1935), Japanese writer and business theoristKingo Nonaka (born 1889), Mexican combat medic and photographerMasahiro Nonaka (野中 政宏) (born 1968), Japanese voice actorShigeru Nonaka (born 1970), Japanese golferTomoyo Nonaka (野中 ともよ) (born 1954), Japanese television personality and chief executiveTori Nonaka, American sport shooter