| Julian Nowak | |
| Office: | Prime Minister of Poland |
| Term Start: | 31 July 1922 |
| Term End: | 14 December 1922 |
| President: | Gabriel Narutowicz (December 1922) |
| 1Blankname: | Chief of State |
| 1Namedata: | Józef Piłsudski (July - December 1922) |
| Predecessor: | Artur Śliwiński |
| Successor: | Władysław Sikorski |
| Birth Name: | Julian Ignacy Nowak |
| Birth Date: | 1865 3, df=yes |
| Birth Place: | Okocim, Austrian Empire |
| Death Place: | Kraków, Poland |
| Nationality: | Polish |
| Party: | Stronnictwo Prawicy Narodowej |
| Occupation: | Politician, physician |
Julian Ignacy Nowak (pronounced as /pl/; 10 March 1865 – 7 November 1946) was a Polish microbiologist and politician who served as 9th Prime Minister of Poland in 1922.
Nowak studied medicine at the Jagiellonian University in 1886–1893 and was a professor there since 1899. In 1921–1922 he was a rector of the university. Being a conservative politician, he served as the Prime Minister briefly in 1922. In the same year, he also served briefly as the Minister of Religious Affairs. In 1922–1927 he was a Senator in the Polish Senate.
He was awarded the Commander's Cross of the Order of Polonia Restituta.
Julian Ignacy Nowak was buried in Rakowicki Cemetery.He was the father of Olympic fencer Wanda Dubieńska.