| Date: | February 18–24 |
| Edition: | 38th (Men) / 28th (Women) |
| Draw: | 32S / 16D |
| Surface: | Hard |
| Prize Money: | $1,353,550 $235,000 |
| Location: | Memphis, United States |
| Category: | ATP World Tour 500 |
| Champms: |  Kei Nishikori |
| Champws: |  Marina Erakovic |
| Champmd: |  Bob Bryan / Mike Bryan |
| Champwd: |  Kristina Mladenovic /  Galina Voskoboeva |
The 2013 U.S. National Indoor Tennis Championships was an ATP World Tour and WTA Tour event held at the hardcourts of the Racquet Club of Memphis in Memphis, Tennessee, United States. It was the 38th edition of the U.S. National Indoor Tennis Championships and the 28th edition of the Memphis WTA International Event. The U.S. National Indoor Tennis Championships is part of the ATP World Tour 500 series on the 2013 ATP World Tour, and the Memphis International is an International-level tournament on the 2013 WTA Tour. The event took place from February 16 to February 24, 2013. Kei Nishikori and Marina Erakovic won the singles titles.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q2 | width=85 | Q1 |
| Men's singles | 500 | 300 | 180 | 90 | 45 | 0 | 20 | 10 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men's doubles | 0 | |||||||||||
| Women's singles | 280 | 200 | 130 | 70 | 30 | 1 | 10 | 6 | 1 | |||
| Women's doubles | 1 |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q2 | width=85 | Q1 |
| Men's singles | $291,800 | $131,560 | $62,320 | $30,070 | $15,330 | $8,435 | $950 | $525 | ||
| Men's doubles * | $86,200 | $38,900 | $18,340 | $8,860 | $4,550 | |||||
| Women's singles | $40,000 | $20,000 | $10,725 | $5,800 | $3,200 | $2,075 | $1,200 | $700 | ||
| Women's doubles * | $11,500 | $6,000 | $3,200 | $1,700 | $900 |
| Country | Player | Ranking1 | Seed | |
|---|---|---|---|---|
| Marin Čilić[1] | 12 | 1 | ||
 Canada | Milos Raonic | 13 | 2 | |
| John Isner | 16 | 3 | ||
| Sam Querrey | 20 | 4 | ||
| Japan | Kei Nishikori | 21 | 5 | |
| Tommy Haas | 22 | 6 | ||
 Ukraine | Alexandr Dolgopolov | 23 | 7 | |
 Spain |
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Brian Baker (knee injury) Mardy Fish (heart problems)
Lukáš Lacko Fernando Verdasco (neck injury)
Xavier Malisse (back injury)
Marinko Matosevic (foot injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Bob Bryan | Mike Bryan | 3 | 1 | |||
 Belarus | Max Mirnyi |  Romania | Horia Tecău | 14 | 2 | |
 Poland | Łukasz Kubot | Canada | Daniel Nestor | 36 | 3 | |
 Austria | Alexander Peya |  Brazil | Bruno Soares | 42 | 4 |
The following pairs received wildcard into the doubles main draw:
The following pairs received entry as alternates:
John Isner (knee injury) Fernando Verdasco (neck injury)| Country | Player | Ranking1 | Seed | |
|---|---|---|---|---|
| Belgium | Kirsten Flipkens | 34 | 1 | |
 Sweden | Sofia Arvidsson | 38 | 2 | |
| Sabine Lisicki | 40 | 3 | ||
 United Kingdom | Heather Watson | 41 | 4 | |
 Czech Republic | Lucie Hradecká | 52 | 5 | |
| Chanelle Scheepers | 59 | 6 | ||
| Slovakia | Magdaléna Rybáriková | 61 | 7 | |
| France | Kristina Mladenovic | 64 | 8 |
The following players received wildcards into the main draw:
Courtney Collins Victoria Duval Garbiñe MuguruzaThe following players received entry from the qualifying draw:
| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Czech Republic | Andrea Hlaváčková | Czech Republic | Lucie Hradecká | 7 | 1 | |
| France | Kristina Mladenovic | Kazakhstan | Galina Voskoboeva | 71 | 2 | |
| New Zealand | Marina Erakovic | United Kingdom | Heather Watson | 115 | 3 | |
| Līga Dekmeijere | Megan Moulton-Levy | 140 | 4 |
The following pairs received wildcard into the doubles main draw:
Taylor Townsend / CoCo VandewegheThe following pairs received entry as alternates:
Alyssa Hibberd / Tiffany Welcher Ashley Murdock / Mariya Słupska Ksenia Pervak (low back injury)
Valeria Savinykh (right shoulder injury)See main article: 2013 U.S. National Indoor Tennis Championships – Men's singles.
Kei Nishikori defeated Feliciano López, 6–2, 6–3See main article: 2013 U.S. National Indoor Tennis Championships – Women's singles.
Marina Erakovic defeated Sabine Lisicki, 6–1, ret.See main article: 2013 U.S. National Indoor Tennis Championships – Men's doubles.
Bob Bryan / Mike Bryan defearted James Blake / Jack Sock, 6–1, 6–2See main article: 2013 U.S. National Indoor Tennis Championships – Women's doubles.
Kristina Mladenovic / Galina Voskoboeva defeated Sofia Arvidsson / Johanna Larsson, 7–6(7–5), 6–3