| Date: | 22–28 April |
| Edition: | 17th |
| Draw: | 48S / 16D |
| Surface: | Hard |
| Location: | León, Mexico |
| Champs: | Blaž Rola |
| Champd: |  Lucas Miedler / Sebastian Ofner |
| After Year: | 2023 |
| After Name: | León Open |
The 2019 Torneo Internacional Challenger León was a professional tennis tournament played on hard courts. It was the seventeenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in León, Mexico between 22 and 28 April 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Kazakhstan | Alexander Bublik | 100 | 1 | |
 Spain | Adrián Menéndez Maceiras | 137 | 2 | |
| Christopher Eubanks | 147 | 3 | ||
| Dustin Brown | 171 | 4 | ||
| Austria | Sebastian Ofner | 172 | 5 | |
 Bosnia and Herzegovina | Mirza Bašić | 185 | 6 | |
 United Kingdom | James Ward | 187 | 7 | |
 Egypt | Mohamed Safwat | 191 | 8 | |
 Serbia | Peđa Krstin | 192 | 9 | |
| Donald Young | 194 | 10 | ||
| Darian King | 203 | 11 | ||
 Ecuador | Roberto Quiroz | 210 | 12 | |
 Australia | John-Patrick Smith | 220 | 13 | |
| Blaž Rola | 255 | 14 | ||
| Austria | Lucas Miedler | 257 | 15 | |
| Marcelo Arévalo | 270 | 16 |
The following players received wildcards into the singles main draw:
Milledge Cossu
Lucas Gómez Gerardo López Villaseñor Luis PatiñoThe following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Andrés Artuñedo
Baptiste Crepatte Manuel Guinard
Skander Mansouri
João MenezesThe following players received entry from the qualifying draw:
Felipe Mantilla Martin RedlickiThe following player received entry as a lucky loser:
See main article: 2019 Torneo Internacional Challenger León – Singles.
Liam Broady 6–4, 4–6, 6–3.See main article: 2019 Torneo Internacional Challenger León – Doubles.
Lucas Miedler / Sebastian Ofner def. Matt Reid / John-Patrick Smith 4–6, 6–4, [10–6].