Nanos can refer to:
- George Peter Nanos, the former director of the Los Alamos National Laboratory
- Apostolos Nanos, an Olympic archer
- Nanos Research, a Canadian polling firm
- Nikita Nanos, the founder of Nanos Research
- Nanos, a plateau in the Dinaric Alps, Slovenia
- Nanos, Vipava, a settlement in the Municipality of Vipava, Slovenia
- nanos, a gene responsible for axis specification in a number of organisms