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
ISR	Dudi Sela	67	1
GER	Florian Mayer	69	2
ESP	Guillermo García López	70	3
KAZ	Mikhail Kukushkin	74	4
DOM	Víctor Estrella Burgos	83	5
HUN	Márton Fucsovics	85	6
ITA	Andreas Seppi	86	7
SRB	Laslo Đere	88	8

• ¹ Rankings are as of January 1, 2017.

The following players received wildcards into the singles main draw:

• Alexander Crnokrak
• Benjamin Mitchell
• Dane Propoggia
• Gavin van Peperzeel

The following players received entry from the qualifying draw:

• Jeremy Beale
• Harry Bourchier
• Thomas Fancutt
• Nathan Pasha

• Andreas Seppi def. Márton Fucsovics 5–7, 6–4, 6–3.

• Jonathan Erlich / Divij Sharan def. Hans Podlipnik Castillo / Andrei Vasilevski 7–6^(7–1), 6–2.

• Official Website