256 teams have registered:

• Adlai E. Stevenson A (Lincolnshire, IL)
• Adlai E. Stevenson B (Lincolnshire, IL)
• Alpharetta (Alpharetta, GA)
• Amador Valley (Pleasanton, CA)
• American Heritage-Plantation (Plantation, FL)
• Apalachee (Winder, GA)
• Arcadia A (Arcadia, CA)
• Arcadia B (Arcadia, CA)
• Arcadia C (Arcadia, CA)
• Athens Academy (Athens, GA)
• Aynor (Aynor, SC)
• Bainbridge (Bainbridge, GA)
• Ballard (Louisville, KY)
• Beachwood (Beachwood, OH; SS)
• Bellaire A (Bellaire, TX)
• Bellaire B (Bellaire, TX)
• Bellarmine College Prep (San Jose, CA)
• Belvidere North A (Belvidere, IL)
• Belvidere North B (Belvidere, IL)
• Benton (Benton, AR)
• Bishop Verot (Fort Myers, FL)
• Breck (Minneapolis, MN)
• Brookwood (Snellville, GA)
• Buchholz (Gainesville, FL)
• Camp Hill (Camp Hill, PA; SS)
• Canyon Crest (San Diego, CA)
• Carbondale (Carbondale, IL)
• Cave Spring (Roanoke, VA)
• Cedar Shoals (Athens, GA)
• Centennial (Roswell, GA)
• Chaminade-Madonna (Hollywood, FL)
• Chanhassen (Chanhassen, MN)
• Chaska A (Chaska, MN)
• Chaska B (Chaska, MN)
• Chattahoochee A (Johns Creek, GA)
• Chattahoochee B (Johns Creek, GA)
• Chester (Chester, SD; SS)
• Cistercian A (Irving, TX)
• Cistercian B (Irving, TX)
• Clark (San Antonio, TX)
• Clements A (Sugar Land, TX)
• Clements B (Sugar Land, TX)
• Collins Hill (Suwanee, GA)
• Corbin (Corbin, KY)
• Corona del Sol (Tempe, AZ)
• Culver (Culver, IN)
• Cumberland (Toledo, IL; SS)
• De Smet (St. Louis, MO)
• DeBakey (Houston, TX)
• Desert Vista A (Phoenix, AZ)
• Desert Vista B (Phoenix, AZ)
• Detroit Catholic Central A (Novi, MI)
• Detroit Catholic Central B (Novi, MI)
• Detroit Catholic Central C (Novi, MI)
• Detroit Country Day (Beverly Hills, MI)
• Dorman A (Roebuck, SC)
• Dorman B (Roebuck, SC)
• Dorman C (Roebuck, SC)
• Dunbar A (Lexington, KY)
• Dunbar B (Lexington, KY)
• Dunwoody (Dunwoody, GA)
• duPont Manual A (Louisville, KY)
• duPont Manual B (Louisville, KY)
• E. O. Smith (Storrs-Mansfield, CT)
• Early College at Guilford A (Greensboro, NC)
• Early College at Guilford B (Greensboro, NC)
• East Chapel Hill (Chapel Hill, NC)
• Eau Claire Regis (Eau Claire, WI)
• Eden Prairie A (Eden Prairie, MN)
• Eden Prairie B (Eden Prairie, MN)
• Edmond Memorial (Edmond, OK)
• Enloe A (Raleigh, NC)
• Enloe B (Raleigh, NC)
• Essex (Essex Junction, VT)
• Etowah (Woodstock, GA)
• Ezell-Harding (Antioch, TN)
• Farragut (Knoxville, TN)
• Fenton (Bensenville, IL)
• Fisher Catholic (Lancaster, OH)
• Flowery Branch (Flowery Branch, GA)
• Foothill (Pleasanton, CA)
• Francis Parker (San Diego, CA)
• Fremont Scholars A
• Fremont Scholars B
• Fremont Scholars C
• Galloway (Atlanta, GA)
• George Washington (Charleston, WV)
• Georgetown Day (Washington, DC)
• Glasgow (Glasgow, KY; SS)
• Grand Junction A (Grand Junction, CO)
• Grand Junction B (Grand Junction, CO)
• Gwinnett Math and Science (Lawrenceville, GA)
• Hallsville A (Hallsville, MO; SS)
• Hallsville B (Hallsville, MO; SS)
• Harmony Science North Austin (Pflugerville, TX; SS)
• Harry Ainlay (Edmonton, AB, Canada)
• High Tech A (Lincroft, NJ)
• High Tech B (Lincroft, NJ)
• Hillsdale Academy (Hillsdale, MI)
• Hoover A (Hoover, AL)
• Hoover B (Hoover, AL)
• Hoover C (Hoover, AL)
• Hudson (Hudson, WI)
• Hume-Fogg (Nashville, TN)
• Hunter A (New York, NY)
• Hunter B (New York, NY)
• Huntsville (Huntsville, AL)
• IMSA A (Aurora, IL)
• IMSA B (Aurora, IL)
• Irvine (Irvine, CA)
• Ithaca (Ithaca, NY)
• J. M. Tate (Cantonment, FL)
• James W. Robinson (Fairfax, VA)
• John Jay (San Antonio, TX)
• Kealing Middle (Austin, TX)
• Kearsley (Flint, MI)
• Kellenberg A (Uniondale, NY)
• Kellenberg B (Uniondale, NY)
• Kent City (Kent City, MI; SS)
• Ladue A (St. Louis, MO)
• Ladue B (St. Louis, MO)
• LASA A (Austin, TX)
• LASA B (Austin, TX)
• LASA C (Austin, TX)
• LASA D (Austin, TX)
• LASA E (Austin, TX)
• Lexington (Lexington, MA)
• Livingston (Livingston, NJ)
• Louisville Eastern (Louisville, KY)
• Loyola Academy (Wilmette, IL)
• Macomb (Macomb, IL; SS)
• Maggie Walker Governor's School A (Richmond, VA)
• Maggie Walker Governor's School B (Richmond, VA)
• Manheim Township A (Lancaster, PA)
• Manheim Township B (Lancaster, PA)
• Marist A (Atlanta, GA)
• Marist B (Atlanta, GA)
• MAST (Highlands, NJ)
• Maumee Valley (Toledo, OH)
• McCallie (Chattanooga, TN)
• Menlo (Atherton, CA)
• Millbrook (Raleigh, NC)
• Millburn (Millburn, NJ)
• Minnetonka (Minnetonka, MN)
• Mira Loma (Sacramento, CA)
• Montgomery Blair (Silver Spring, MD)
• Montpelier (Montpelier, VT; SS)
• Mounds Park A (St. Paul, MN)
• Mounds Park B (St. Paul, MN)
• Mounds View A (Arden Hills, MN)
• Mounds View B (Arden Hills, MN)
• Mountain Lakes (Mountain Lakes, NJ)
• Muldrow (Muldrow, OK; SS)
• Myers Park (Charlotte, NC)
• Norcross (Norcross, GA)
• Norman North (Norman, OK)
• North Hollywood (North Hollywood, CA)
• North Kansas City (North Kansas City, MO)
• North Miami (Denver, IN; SS)
• Northampton (Northampton, MA)
• Northmont (Clayton, OH)
• Novi A (Novi, MI)
• Novi B (Novi, MI)
• O'Connor (Helotes, TX)
• O'Gorman (Sioux Falls, SD)
• Oak Ridge (Oak Ridge, TN)
• Olmsted Falls (Olmsted Falls, OH)
• Ottawa Hills (Toledo, OH; SS)
• Parish Episcopal (Dallas, TX)
• Park Hill South (Riverside, MO)
• Parkway West (Chesterfield, MO)
• Penn Manor (Millersville, PA)
• Phoenixville (Phoenixville, PA)
• Pilot Grove (Pilot Grove, MO; SS)
• Plymouth (Canton, MI)
• Quince Orchard (Gaithersburg, MD)
• Raleigh Charter (Raleigh, NC)
• Rancho Bernardo (San Diego, CA)
• Ranney (Tinton Falls, NJ)
• Ransom Everglades A (Coconut Grove, FL)
• Ransom Everglades B (Coconut Grove, FL)
• Richard Montgomery A (Rockville, MD)
• Richard Montgomery B (Rockville, MD)
• Ridgewood (Ridgewood, NJ)
• Riverside Brookfield A (Riverside, IL)
• Riverside Brookfield B (Riverside, IL)
• Robbinsdale Armstrong (Plymouth, MN)
• Rockford Auburn A (Rockford, IL)
• Rockford Auburn B (Rockford, IL)
• Rockport (Rockport, MA; SS)
• Ronald Reagan (San Antonio, TX)
• Russell (Russell, KY; SS)
• Saint Joseph (South Bend, IN)
• San Diego Scholars
• San Dieguito (Encinitas, CA)
• Santa Monica (Santa Monica, CA)
• Savannah (Savannah, MO)
• Seven Lakes (Katy, TX)
• Shanghai American-Puxi (Shanghai, China)
• Sidney (Sidney, OH)
• Skyline (Ann Arbor, MI)
• Solon A (Solon, OH)
• Solon B (Solon, OH)
• South Forsyth (Cumming, GA)
• South Range (Canfield, OH; SS)
• Southern Fulton (Warfordsburg, PA; SS)
• Spain Park (Hoover, AL)
• Springfield (Springfield, IL)
• St. Andrew's (Ridgeland, MS)
• St. Benedict at Auburndale (Cordova, TN)
• St. Charles (Bexley, OH)
• St. James (Murrells Inlet, SC)
• St. John's (Houston, TX)
• St. Joseph (Metuchen, NJ)
• St. Mark's School of Texas (Dallas, TX)
• St. Pius X (Kansas City, MO)
• St. Thomas Academy (Mendota Heights, MN)
• State College A (State College, PA)
• State College B (State College, PA)
• Stigler (Stigler, OK; SS)
• Stillman Valley (Stillman Valley, IL; SS)
• Stoneman Douglas (Parkland, FL)
• Stoughton A (Stoughton, WI)
• Stoughton B (Stoughton, WI)
• Sycamore (Cincinnati, OH)
• Thomas Jefferson Science & Tech A (Alexandria, VA)
• Thomas Jefferson Science & Tech B (Alexandria, VA)
• Tippecanoe (Tipp City, OH)
• Torrey Pines (San Diego, CA)
• Treasure Valley (Boise, ID)
• Troy (Troy, MI)
• University School of Nashville (Nashville, TN)
• Urbana (Urbana, OH; SS)
• Utica Academy (Sterling Heights, MI)
• Valdosta (Valdosta, GA)
• Verrado (Buckeye, AZ)
• Walker (Marietta, GA)
• Walter Johnson (Bethesda, MD)
• Walton (Marietta, GA)
• Wando (Mt. Pleasant, SC)
• Wayzata A (Plymouth, MN)
• Wayzata B (Plymouth, MN)
• Wayzata C (Plymouth, MN)
• Wayzata D (Plymouth, MN)
• Wellsboro (Wellsboro, PA; SS)
• West Point A (Cullman, AL; SS)
• West Point B (Cullman, AL; SS)
• Western Albemarle (Crozet, VA)
• Westminster (Atlanta, GA)
• Whitesburg Christian A (Huntsville, AL)
• Whitesburg Christian B (Huntsville, AL)
• Whitley County (Williamsburg, KY)
• Wilmington Charter A (Wilmington, DE)
• Wilmington Charter B (Wilmington, DE)
• Winchester Thurston (Pittsburgh, PA)
• Woodward Academy (College Park, GA)

The teams marked by “SS” are eligible for the Small School title.

There is a waitlist:

1. Ronald Reagan B (San Antonio, TX)
2. D. W. Daniel (Central, SC)
3. Harmony Science North Austin B (Pflugerville, TX)
4. Riverdale (Mt. Blanchard, OH)
5. St. Xavier (Louisville, KY)
6. Conestoga (Berwyn, PA)
7. Stuyvesant (New York, NY)

The field is limited to 256 teams.