| 2018 Cary Challenger | |
|---|---|
| Date | 10–16 September |
| Edition | 4th |
| Draw | 32S / 16D |
| Surface | Hard |
| Location | Cary, North Carolina, United States |
| Champions | |
| Singles | |
 James Duckworth | |
| Doubles | |
 Evan King / Hunter Reese | |
The 2018 Cary Challenger was a professional tennis tournament played on hard courts. It was the 4th edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Cary, North Carolina, United States between 10 and 16 September 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CAN | Peter Polansky | 119 | 1 |
 SWE | Elias Ymer | 132 | 2 |
 ESA | Marcelo Arévalo | 146 | 3 |
| USA | Reilly Opelka | 173 | 4 |
| USA | Bjorn Fratangelo | 175 | 5 |
| USA | Kevin King | 180 | 6 |
| AUS | Alexei Popyrin | 195 | 7 |
| AUS | Maverick Banes | 216 | 8 |
The following players received wildcards into the singles main draw:
William Blumberg Alexis Galarneau Sebastian Korda Nick StachowiakThe following players received entry from the qualifying draw:
Joris De Loore James Duckworth Evan Song Jeffrey John Wolf James Duckworth def. Reilly Opelka 7–6(7–4), 6–3. Evan King / Hunter Reese def. 
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