The following page lists the team names, coaches, and players of the top four teams at each NSC. Click on each year for a more detailed writeup.
| 2016 | Champions | Liberal Arts and Science Academy Austin, TX Jason Flowers | Trevor Binford, John DiCarlo, Ethan Russo, Corin Wagen |
| Runner-Up | Adlai E. Stevenson High School Lincolnshire, IL Ryan Fedewa | Marco Laudati, Young Lee, Ali Saeed, Kazuma Shimanaka | |
| Third Place | Thomas Jefferson High School for Science and Technology Alexandria, VA Dennis Loo | Ryan Golant, Rohan Hegde, Alex Howe, Michael Yue | |
| Fourth Place | Hinsdale Central High School Hinsdale, IL Alan McCloud, Eric Jensen | Ankush Bajaj, Sunny Chen, Brendan Ryan, James Zhou | |
| 2015 | Champions | Detroit Catholic Central HS Novi, MI Christopher Gismondi, Benjamin Herman | Joshua Cantie, Austin Foos, Conner Reynolds, Jack Watts |
| Runner-Up | Liberal Arts and Science Academy Austin, TX Jason Flowers | Alex Denko, Forrest Hammel, Ethan Russo, Corin Wagen | |
| Third Place | Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Hana Reed, Juanita Lasswell | Patrick Canteros, Parth Kotak, Will Overman, Connor Wood | |
| Fourth Place | High Technology High School Lincroft, NJ Raymond Eng | Julian Gau, Adithya Kannan, Rohan Kodialam, Sharan Kumar | |
| 2014 | Champions | Liberal Arts and Science Academy Austin, TX Jason Flowers | Alex Freed Ben Jones Arnav Sastry Nathan Weiser |
| Runner-Up | Western Albemarle High School Crozet, VA Eric Strzepek | Patrick Andrews Tim Dodson Sam Lesemenn Angela Li Kelly Missett Eric Xu | |
| Third Place | St. John's School Houston, TX David Nathan | George Davies Carlo De Guzman Claire Jones Deven Lahoti | |
| Fourth Place | Ladue Horton Watkins HS St. Louis, MO Jonah Krueger Mike Hill | Jialin Ding Michael Prablek Kisan Thakkar Hou "Ben" Zhang | |
| 2013 | Champions | Ladue Horton Watkins HS St. Louis, MO Jeffrey Miller Mike Hill | Jialin Ding Maximilian Schindler Haohang Xu Hou "Ben" Zhang |
| Runner-Up | Liberal Arts and Science Academy Austin, TX Jason Flowers | Roger Cain Arthur Lee Allan Sadun Nathan Weiser | |
| Third Place | Loyola Academy Wilmette, IL Matt Laird | Rosie Frehe Zach Hayes Ian Torres Morgan Venkus | |
| Fourth Place | Paul M. Dorman HS Roebuck, SC Geoffrey Thomas | Meghan Clusserath Madhav Kumar Brian Owen Tabitha Walker | |
| 2012 | Champions | Hunter College HS New York, NY Stephen Young | Lily Chen York Chen Richard Yu Zihan Zheng |
| Runner-Up | Bellarmine College Preparatory San Jose, CA Chris Fleitas | Ankit Aggarwal Nikhil Desai Sameer Rai | |
| Third Place | Centennial HS Roswell, GA | Claire Garland Will June Adam Silverman Nikhil Vallabhaneni | |
| Fourth Place | Illinois Math and Science Academy Aurora, IL Noah Prince | Webster Guan Adam Kalinich Nolan Maloney Eric Ordonez | |
| 2011 | Champions | State College Area HS State College, PA Julie Gittings | David Liu Graham Moyer Christoph Schlom |
| Runner-Up | Hunter College HS New York, NY Stephen Young | Lily Chen York Chen Richard Yu Zihan Zheng | |
| Third Place | Liberal Arts and Science Academy Austin, TX Jason Flowers | Daniel Chupin Thomas Littrell Benji Nguyen Aaron Pellowski | |
| Fourth Place | Adlai E. Stevenson HS Lincolnshire, IL Ryan Fedwah | Zach Blumenfeld Eugene Bulkin Kevin Malis Mark Savin Joe Schlude Collin Shapiro | |
| 2010 | Champions | State College Area HS State College, PA Julie Gittings | David Liu Monica McLaughlin Graham Moyer Christoph Schlom |
| Runner-Up | Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Dr. John Barnes | Sarah Angelo Tommy Casalaspi JR Roach Greg Tito | |
| Third Place | Liberal Arts and Science Academy Austin, TX Jason Flowers | Daniel Chupin Shen Gong Thomas Littrell Benji Nguyen | |
| Fourth Place | St. Anselm's Abbey School Washington, DC Hajnalka Enzel | Matthew Bollinger Aidan Mehigan Jacob Wasserman | |
| 2009 | Champions | Charter School of Wilmington Wilmington, DE Bill Tressler | Andrew Berni Henry Gorman David Huang Neeraj Vijay |
| Runner-Up | State College Area HS State College, PA Julie Gittings | Ben Geselowitz David Liu Monica McLaughlin Graham Moyer | |
| Third Place | Georgetown Day School Washington, DC | Daniel Brach-Neufeld Ian Eppler Oliver Hudson Matt Jackson | |
| Fourth Place | Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Dr. John Barnes | Sarah Angelo Tommy Casalaspi Matt Kluge Greg Tito | |
| 2008 | Champions | Walt Whitman HS Bethesda, MD Jan Danis | Daniel Brezina Shantanu Jha Damjan Korac Adam Marshall |
| Runner-Up | Thomas Jefferson HS for Science and Technology Alexandria, VA | Phil Graves Mohit Iyyer Keshav Pillai Naren Tallapragada | |
| Semifinalists | Paul Dorman HS Roebuck, SC Eric Huff | Nick Clusserath Freddy DeAngelis Arsalaan Salehani George Stevens | |
| Charter School of Wilmington Wilmington, DE Bill Tressler | Henry Gorman Rui Hu Raja Vel Neeraj Vijay | ||
| 2007 | Champions | Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Dr. John Barnes | Evan Adams Will Butler Mark Guerci Mehdi Razvi |
| Runner-Up | Martin Luther King, Jr. Magnet HS Nashville, TN | Will Ladnier Saran Raju Cody Simons Dallas Simons | |
| Semifinalists | Thomas Jefferson HS for Science and Technology Alexandria, VA | Phillip Graves Mohit Iyyer Keshav Pillai Evan Silberman | |
| Paul Dorman HS Roebuck, SC Eric Huff | Paolo Arce Nick Clusserath Mark Hahnenberg Arsalaan Salehani | ||
| 2006 | Champions | Raleigh Charter HS Durman, NC Eric Grunden | Chris Hoersting Katie Huddleston Will Schultz Andrew Zonderman |
| Runner-Up | Richard Montgomery HS Rockville, MD Daniel McKenna | Keith Jamieson David Liu Chris Ray Jeffrey Siegel | |
| Semifinalists | State College Area HS State College, PA Julie Gittings Smita Gandhi | Ylaine Gerardin Francois Greer Alison Hudson Barry Liu | |
| Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Dr. John Barnes | Evan Adams Will Butler Mark Guerci Xun Zhou | ||
| 2005 | Champions | Thomas Jefferson HS for Science and Technology Alexandria, VA Nancy Kreloff | Sam Lederer Jacob Oppenheim Will Sullivan Dan Wright |
| Runner-Up | State College Area HS State College, PA Julie Gittings Smita Gandhi | Ylaine Gerardin Alison Hudson John Lesieutre John Onusic | |
| Semifinalists | Mission San Jose HS Fremont, CA | Darwin Fu Roger Fu Kevin Koai Da Qiu Nicole Wan | |
| Thomas Jefferson HS for Science and Technology B Alexandria, VA Nancy Kreloff | Neel Kotra Alexandra Levy Charlotte Seid Nick Stroup Scott Ylinen | ||
| 2004 | Champions | Maggie L. Walker Governor's School for Government and International Studies Richmond, VA Dr. John Barnes | Allen Bristow Lyric Doshi Wren Elhai Neel Ray |
| Runner-Up | Thomas Jefferson HS for Science and Technology Alexandria, VA Nancy Kreloff | Sam Lederer Jacob Oppenheim Will Sullivan Steven Young | |
| Semifinalists | Richard Montgomery HS Rockville, MD Daniel McKenna | Daniel Belkin Alex Kaufman Humza Kazmi Tobin Marcus Seth Samelson | |
| St. John's School Houston, TX Ted Curry | Alexander Ahkter Paul Brandt Andrew Brantley Ranjan Ramchandani | ||
| 2003 | Champions | Paul Dorman HS Spartanburg, SC Eric Huff | Cale Bonner Adam Herring Jason Kopp Terrill Wilkins |
| Runner-Up | Thomas Jefferson HS for Science and Technology Alexandria, VA Nancy Kreloff | Sam Lederer Jacob Oppenheim Shekar Sidarth Steven Young | |
| Semifinalists | Paul Lawrence Dunbar HS Lexington, KY Matt Knupp Chuck Dean | Alex Bibbey Ting Ting Fu Tyler Quick Nick Steinmetz James Zhang | |
| Catholic Central HS Redford, MI Howard Weinberg Jason Jones | Charles Drummond Joel Knight Frank Patino Joe Rancour Peter Troyan Mike Warren | ||
| 2002 | Champions | Richard Montgomery HS Rockville, MD Daniel McKenna Brad Ayers, team president | Tyler Allard Jacob Leibenluft Erica Morgan Arthur O'Dwyer |
| Runner-Up | Catholic Central HS Redford, MI Howard Weinberg Sue Leininger | Frank Budde Joe Galea Jarin Philip John Schultz Peter Troyan | |
| Semifinalists | Eleanor Roosevelt HS Greenbelt, MD Gerald Greenbaum | Kanaan Mahadevan Bailey McCreery Peter Nilson Ben Thompson | |
| Detroit Country Day School Detroit, MI Eugene Jurkiewicz | Scott Francis Andy Lytle Pradeep Mouli Tim Svenson Robert Wilson | ||
| 2001 | Champions | State College Area HS State College, PA Julie Gittings Debbie Wells | Susanna Burrowes Martin Devecka Julia Liu David Schloss |
| Runner-Up | Georgetown Day School Washington, DC Sue Ikenberry | Ernest Le Dan Luban Alexis Neuhaus Dan Suzman | |
| Semifinalists | Catholic Central HS Redford, MI Howard Weinberg Sue Leininger | Josh Crawford Joe Galea Chris Hammer John Schultz Jeff Shattock | |
| Detroit Country Day School Detroit, MI Eugene Jurkiewicz | Scott Francis Nate Meyvis Pradeep Mouli Sudheer Potru Sameer Walavalkar | ||
| 2000 | Champions | State College Area HS State College, PA Julie Gittings Debbie Wells | Martin Devecka Jacob Mikanowski Madhury Ray Nicole Szacon |
| Runner-Up | Eisenhower HS Utica, MI Ruth Tharp | Christopher Hayward Michael Klida Christopher Pappa Kevin Roth | |
| Semifinalists | Paul Dorman HS Spartanburg, SC James Garrick, Jr. Dianne Earle | Sulman Ali Julie Cook John McBride LuElla Putnam Geoffrey Thomas | |
| Riverdale HS Murfreesboro, TN Carlotta Wright Cathy Sniderman | Patrick Currier William Gill John Merrill Patrick Riser Meg Sniderman John Truex | ||
| 1999 | Champions | State College Area HS State College, PA Julie Gittings Debbie Wells | Martin Devecka Lyn Lai Jacob Mikanowski Cathy Vrentas |
| Runner-Up | Rockville HS Rockville, MD Kevin Keegan Linda Mencarini | Aaron Benor Matt Denio Todd Hunter Daniel Maggin Matt Malament | |
| Semifinalists | Catholic Central HS Redford, MI Howard Weinberg | Vincent Crafton Corey Mason Jesse Norman Paul Schultz Mark Walkuski | |
| Eleanor Roosevelt HS Greenbelt, MD Gerald Greenbaum Michael Samordic | Andrew Aziz Patrick Dwiggens Daniel Greenstein Vinita Kailasnath Peter Nilson Samip Patel | ||
| 1998 | Champions | State College Area HS State College, PA Julie Gittings Debbie Wells | Mike Chiswick-Patterson Aaron Lichtig Jacob Mikanowski Cathy Vrentas |
| Runner-Up | Henry Ford II HS Sterling Heights, MI Mark Mikel Jamie Brault | Nathan Belanger Greg Brault Chris Galeczka Jeff Meyers Hieu Nguyen | |
| Semifinalists | Copley HS Copley, OH Sue Korosa Alice Rote | Edward Chang Brandon Eilertson Jeff Ellis Jeff Kroeger Molly Regennitter | |
| Gonzaga College HS Washington, DC Father Ken Meehan | Robert Arevalo Vincent Diamante Andrew Pomerance Justin Sausville |