The 2018 Canberra Challenger was a professional tennis tournament played on outdoor hard courts. It was the third edition of the tournament which was a part of the 2018 ATP Challenger Tour. It took place in Canberra, Australia between 8 and 13 January 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Israel | Dudi Sela | 67 | 1 | |
| Florian Mayer | 69 | 2 | ||
 Spain | Guillermo García López | 70 | 3 | |
 Kazakhstan | Mikhail Kukushkin | 74 | 4 | |
 Dominican Republic | Víctor Estrella Burgos | 83 | 5 | |
 Hungary | Márton Fucsovics | 85 | 6 | |
 Italy | Andreas Seppi | 86 | 7 | |
 Serbia | Laslo Đere | 88 | 8 |
The following players received wildcards into the singles main draw:
Alexander Crnokrak Benjamin Mitchell Dane Propoggia Gavin van PeperzeelThe following players received entry from the qualifying draw:
See main article: 2018 Canberra Challenger – Singles.
Andreas Seppi def. Márton Fucsovics 5–7, 6–4, 6–3.See main article: 2018 Canberra Challenger – Doubles.
Jonathan Erlich / 
Divij Sharan def. Hans Podlipnik Castillo / 
Andrei Vasilevski 7–6(7–1), 6–2.