272 teams have registered:

• Adlai E. Stevenson A (Lincolnshire, IL)
• Adlai E. Stevenson B (Lincolnshire, IL)
• Advanced Math & Science A (Marlborough, MA)
• Advanced Math & Science B (Marlborough, MA)
• Alagar Homeschool (Pittsburgh, PA)
• Alpharetta (Alpharetta, GA)
• Amador Valley (Pleasanton, CA)
• American Heritage-Boca-Delray (Delray Beach, FL)
• American Heritage-Plantation A (Plantation, FL)
• American Heritage-Plantation B (Plantation, FL)
• Arcadia A (Arcadia, CA)
• Arcadia B (Arcadia, CA)
• Bainbridge (Bainbridge, GA)
• Baton Rouge Magnet (Baton Rouge, LA)
• Battle Ground (Franklin, TN)
• Bellaire (Bellaire, TX)
• Bellarmine College Prep (San Jose, CA)
• Belvidere (Belvidere, IL)
• Belvidere North A (Belvidere, IL)
• Belvidere North B (Belvidere, IL)
• Benton (Benton, AR)
• Bergen Academies (Hackensack, NJ)
• Bishop Guertin (Nashua, NH)
• Bishop Heelan (Sioux City, IA)
• Blacksburg (Blacksburg, VA)
• Brandeis (San Antonio, TX)
• Brandon (Brandon, MS)
• Branson (Branson, MO)
• Brophy College Prep (Phoenix, AZ)
• Brunswick (Brunswick, OH)
• Burlington (Burlington, VT)
• Burnsville A (Burnsville, MN)
• Burnsville B (Burnsville, MN)
• Burnsville C (Burnsville, MN)
• Campbell County (Alexandria, KY)
• Carnegie Vanguard (Houston, TX)
• Carrboro (Carrboro, NC)
• Cave Spring A (Roanoke, VA)
• Cave Spring B (Roanoke, VA)
• Cedar Crest A (Lebanon, PA)
• Cedar Crest B (Lebanon, PA)
• Centennial A (Ellicott City, MD)
• Centennial B (Ellicott City, MD)
• Centennial C (Ellicott City, MD)
• Chaska (Chaska, MN)
• Chattahoochee A (Johns Creek, GA)
• Chattahoochee B (Johns Creek, GA)
• Chattahoochee C (Johns Creek, GA)
• Cinco Ranch (Katy, TX)
• Cistercian A (Irving, TX)
• Cistercian B (Irving, TX)
• Cistercian C (Irving, TX)
• Clark (San Antonio, TX)
• Cloverleaf A (Lodi, OH)
• Cloverleaf B (Lodi, OH)
• Collins Hill A (Suwanee, GA)
• Collins Hill B (Suwanee, GA)
• Conway A (Conway, AR)
• Conway B (Conway, AR)
• Conway C (Conway, AR)
• Copley (Copley, OH)
• Coronado A (El Paso, TX)
• Coronado B (El Paso, TX)
• Cy-Fair (Cypress, TX)
• Darien A (Darien, CT)
• Darien B (Darien, CT)
• Davis (Davis, CA)
• DeBakey (Houston, TX)
• Decatur A (Decatur, GA)
• Decatur B (Decatur, GA)
• Del Norte (San Diego, CA)
• Detroit Catholic Central A (Novi, MI)
• Detroit Catholic Central B (Novi, MI)
• Detroit Country Day (Beverly Hills, MI)
• Dorman A (Roebuck, SC)
• Dorman B (Roebuck, SC)
• Dougherty Valley A (San Ramon, CA)
• Dougherty Valley B (San Ramon, CA)
• Dublin Jerome (Dublin, OH)
• Dublin Scioto (Dublin, OH)
• DuBois (DuBois, PA)
• Dunbar (Lexington, KY)
• East Brunswick A (East Brunswick, NJ)
• East Brunswick B (East Brunswick, NJ)
• East Chapel Hill (Chapel Hill, NC)
• Eden Prairie A (Eden Prairie, MN)
• Eden Prairie B (Eden Prairie, MN)
• Eden Prairie C (Eden Prairie, MN)
• Edison Academy (Edison, NJ)
• Edmond Memorial A (Edmond, OK)
• Edmond Memorial B (Edmond, OK)
• Enloe (Raleigh, NC)
• Ezell-Harding (Antioch, TN)
• Fairfield (Fairfield, IL)
• Fisher Catholic (Lancaster, OH)
• Fremont Scholars A
• Fremont Scholars B
• Friends Select A (Philadelphia, PA)
• Friends Select B (Philadelphia, PA)
• Galloway (Atlanta, GA)
• Gatton Academy (Bowling Green, KY)
• Good Hope (Cullman, AL)
• Grand Junction A (Grand Junction, CO)
• Grand Junction B (Grand Junction, CO)
• Great Neck Scholars
• Great Valley (Malvern, PA)
• Greenhill (Addison, TX)
• Hallsville (Hallsville, MO)
• Helias A (Jefferson City, MO)
• Helias B (Jefferson City, MO)
• Henderson (West Chester, PA)
• Hickman (Columbia, MO)
• High Point Central (High Point, NC)
• High Tech (Lincroft, NJ)
• Hinsdale Central (Hinsdale, IL)
• Homestead A (Cupertino, CA)
• Homestead B (Cupertino, CA)
• Hoover A (Hoover, AL)
• Hoover B (Hoover, AL)
• Houston (Germantown, TN)
• Hudson (Hudson, WI)
• Hume-Fogg (Nashville, TN)
• Hunter A (New York, NY)
• Hunter B (New York, NY)
• Huntingdon (Huntingdon, PA)
• Huntsville (Huntsville, AR)
• IMSA (Aurora, IL)
• Indiana Area (Indiana, PA)
• Irvine (Irvine, CA)
• J. M. Tate (Cantonment, FL)
• James E. Taylor (Katy, TX)
• Jenks (Jenks, OK)
• Johns Creek (Johns Creek, GA)
• Kellenberg (Uniondale, NY)
• Kickapoo (Springfield, MO)
• Killian Hill Christian (Lilburn, GA)
• L&N STEM (Knoxville, TN)
• La Jolla (La Jolla, CA)
• Lakeside (Seattle, WA)
• LAMP (Montgomery, AL)
• LASA A (Austin, TX)
• LASA B (Austin, TX)
• LASA C (Austin, TX)
• LASA D (Austin, TX)
• LASA E (Austin, TX)
• Lee's Summit West (Lee's Summit, MO)
• Leland (San Jose, CA)
• Lexington A (Lexington, MA)
• Lexington B (Lexington, MA)
• Lincoln (Tallahassee, FL)
• Livingston A (Livingston, NJ)
• Livingston B (Livingston, NJ)
• Loyola Academy (Wilmette, IL)
• LSU Lab (Baton Rouge, LA)
• Macomb (Macomb, IL)
• Maine South (Park Ridge, IL)
• Manheim Township A (Lancaster, PA)
• Manheim Township B (Lancaster, PA)
• MAST (Highlands, NJ)
• Merrol Hyde (Hendersonville, TN)
• Millburn A (Millburn, NJ)
• Millburn B (Millburn, NJ)
• Montgomery Blair (Silver Spring, MD)
• Mounds Park A (St. Paul, MN)
• Mounds Park B (St. Paul, MN)
• Mounds View (Arden Hills, MN)
• Mount de Sales (Macon, GA)
• Norman A (Norman, OK)
• Norman B (Norman, OK)
• Norman North (Norman, OK)
• North Hagerstown (Hagerstown, MD)
• North Kansas City (North Kansas City, MO)
• North White (Monon, IN)
• Northmont (Clayton, OH)
• Northview A (Johns Creek, GA)
• Northview B (Johns Creek, GA)
• Notre Dame Prep (Pontiac, MI)
• Novi A (Novi, MI)
• Novi B (Novi, MI)
• Oak Ridge (Oak Ridge, TN)
• Okemos (Okemos, MI)
• Olentangy Liberty A (Powell, OH)
• Olentangy Liberty B (Powell, OH)
• Olmsted Falls (Olmsted Falls, OH)
• Olympian A (Chula Vista, CA)
• Olympian B (Chula Vista, CA)
• Omaha North (Omaha, NE)
• Orono (Long Lake, MN)
• Parish Episcopal (Dallas, TX)
• Phillips Academy (Andover, MA)
• Pickens Academy (Carrollton, AL)
• Providence A (Charlotte, NC)
• Providence B (Charlotte, NC)
• Providence (Plymouth, MN)
• Quince Orchard (Gaithersburg, MD)
• Raleigh Charter (Raleigh, NC)
• Red Bank (Chattanooga, TN)
• Richard Montgomery (Rockville, MD)
• Ripley (Ripley, WV)
• Robbinsdale Armstrong A (Plymouth, MN)
• Robbinsdale Armstrong B (Plymouth, MN)
• Rock Bridge A (Columbia, MO)
• Rock Bridge B (Columbia, MO)
• Rock Creek (Bokchito, OK)
• Rockford Auburn (Rockford, IL)
• Ronald Reagan (San Antonio, TX)
• Rootstown (Rootstown, OH)
• Roseville (Roseville, MN)
• Saint Stephen's Episcopal A (Bradenton, FL)
• Saint Stephen's Episcopal B (Bradenton, FL)
• Sarcoxie (Sarcoxie, MO)
• Savannah (Savannah, MO)
• Seven Lakes A (Katy, TX)
• Seven Lakes B (Katy, TX)
• Solon A (Solon, OH)
• Solon B (Solon, OH)
• Spain Park (Hoover, AL)
• Springwood (Lanett, AL)
• St. Andrew's A (Ridgeland, MS)
• St. Andrew's B (Ridgeland, MS)
• St. John's A (Houston, TX)
• St. John's B (Houston, TX)
• St. Joseph Central (St. Joseph, MO)
• St. Louis Park (St. Louis Park, MN)
• St. Mark's School of Texas A (Dallas, TX)
• St. Mark's School of Texas B (Dallas, TX)
• St. Paul Academy (St. Paul, MN)
• St. Pius X (Kansas City, MO)
• St. Thomas A (Houston, TX)
• St. Thomas B (Houston, TX)
• State College A (State College, PA)
• State College B (State College, PA)
• Stoughton A (Stoughton, WI)
• Stoughton B (Stoughton, WI)
• Strake Jesuit (Houston, TX)
• Stuyvesant (New York, NY)
• Subiaco Academy (Subiaco, AR)
• TAG Magnet (Dallas, TX)
• Thomas County Central (Thomasville, GA)
• Thomas Jefferson Classical (Mooresboro, NC)
• Thomas Jefferson Science & Tech A (Alexandria, VA)
• Thomas Jefferson Science & Tech B (Alexandria, VA)
• Thomas Jefferson Science & Tech C (Alexandria, VA)
• Tippecanoe (Tipp City, OH)
• Torrey Pines (San Diego, CA)
• Troy (Troy, MI)
• UChicago Lab (Chicago, IL)
• Valle Verde (El Paso, TX)
• Village (Houston, TX)
• Wade Hampton A (Greenville, SC)
• Wade Hampton B (Greenville, SC)
• Walnut Hills (Cincinnati, OH)
• Walter Johnson (Bethesda, MD)
• Walton (Marietta, GA)
• Warren G. Harding (Warren, OH)
• Washington A (Washington, MO)
• Washington B (Washington, MO)
• Wayzata A (Plymouth, MN)
• Wayzata B (Plymouth, MN)
• Wayzata C (Plymouth, MN)
• Wayzata D (Plymouth, MN)
• Wayzata E (Plymouth, MN)
• West Point A (Cullman, AL)
• West Point B (Cullman, AL)
• Western (Las Vegas, NV)
• Westminster (Atlanta, GA)
• Westview (Portland, OR)
• Wilmington Charter A (Wilmington, DE)
• Wilmington Charter B (Wilmington, DE)
• Wilmington Charter C (Wilmington, DE)
• Winchester Thurston (Pittsburgh, PA)
• Windhaven Park

The field is limited to 272 teams.