- AMATYC Student Math League - Series of mathematical contests organized by The American Mathematical Association of Two-Year Colleges (AMATYC).
- American Invitational Mathematics Examination (AIME) - Intermediate examination for the top scoring students from the AMC 10 and AMC 12. Site includes problem archive, publications.
- American Mathematics Contest 10 - Contest for students in grade 10 or below. Site includes results, publications, photos, awards, faq.
- American Mathematics Contest 12 - Contest for students in grade 12 or below. Site includes results, publications, problem archive, awards.
- American Mathematics Contest 8 - contest for middle school students in United States. Site includes results, past problems, statistics, photos, awards.
- American Regions Math League (ARML) - Results and past problems for the ARML, an annual national competition.
- The Continental Mathematics League and The National Olympiads - CML offers a series of math meets for grades 2-9, a calculus league for the high school, and a Java computer contest.
- Furman Mathematics Tournament - Hosted by the Furman University. Site includes past results and written problems.
- Harvard-MIT Mathematics Tournament - Annual math tournament for high school students, held at MIT and at Harvard in alternating years.
- High School Mathematical Contest in Modeling (HiMCM) - A two-day mail-in team contest in which students work in teams to apply mathematics to real-world modeling problems.
- The Mandelbrot Competition - Includes introduction to contest, news, memos, resources and on-line registration.
- Math League - Specializes in math contests, books, and computer software designed for students from the 4th grade through high school.
- MathCounts - United States national math coaching and competition program for middle school students.
- Mu Alpha Theta National Contest - Annual math writing contest sponsored by the Nationa Mathematics Honor Society. Participants must be members.
- National Assessment & Testing - Offers five competitions administered and scored at your school, then returned to them by mail for determination of awards.
- William Lowell Putnam Mathematical Competition - Annual student math competition sponsored by the Mathematical Association of America.
- Redwood Empire Mathematics Tournament - Annual event held at Humboldt State University for all middle and high schools students.
- UIUC Math Contests Webpage - The UIUC Undergraduate Mathematics Contest. Includes practice problems and solutions.
- United States of America Mathematical Olympiad (USAMO) - Final contest used for the selections of the U.S. IMO team. Site includes problem archive, publications, awards.
- Wisconsin Mathematics, Engineering, and Science Talent Search - Offers problem sets of five challenging problems designed to encourage exploration outside the classroom and inspire students to develop problem-solving and mathematical writing skills.
- Alabama Statewide Mathematics Contest - State contest available to high school students in three divisions.
- Grissom High School Math Team - Hosts annual math tournament with several categories including pre-algebra, algebra, geometry, algebra II. and comprehensive.
- Rocket City Math League - Based in Huntsville, Alabama. Website contains registration information and sample tests.
- The University of Alabama High School Math Tournament - Math Tournament hosted by the University of Alabama Mathematics Department each fall for excellent high school students from all over Alabama and throughout the southeast. The tournament consists of a written exam and a ciphering competition.
- Bay Area Math Circle - Features The Bay Area Mathematical Olympiad (BAMO) and weekly program for San Francisco Bay Area high and middle school students.
- Bay Area Math Meet - Annual, all-day competition featuring both individual and team events. the core events include Math Bowl and Test of Ingenuity. Website contains detailed description, past exam, and results.
- Creative Studies Math Competition - Hosted by the College of Creative Studies at University of California, Santa Barbara.
- Math Challenge - Sponsors by Lawrence Livermore National Laboratory. Students participate in a one-hour written test both individually and as a team.
- Pomona College / University of Wisconsin High School Math Talent Search - Year around contest that tests talent in problem solving.
- Santa Clara University High School Mathematics Contest - An annual High School Mathematics Contest usually scheduled on the second Saturday in November. This is a three hour exam which tests problem solving skills and mathematical ingenuity.
- Stanford Math Tournament - Annual math event sponsored by the Stanford Mathematics Department. Site contains results, past tests and solutions.
- Colorado Mathematical Olympiad - Introduction to Mathematical Olympiad, old problems, pages on winners, speakers and judges from 1999 and 2000.
- David Essner Mathematics Competition - Annual competition among the secondary school students of Miami-Dade County in Florida with results and past problems.
- Armstrong Atlantic State University Math Tournament - Features annual mathematics tournament for high school students and middle school Math Bowl.
- Gainesville College Math Tournament For Two-Year Colleges - Held in the spring of each year, the competition features both individual and team events involving problems from calculus, trigonometry, geometry, statistics, and algebra.
- Junior Varsity State Tournament - Hosted by Woodward Academy. Information page includes past results and news for future contests.
- University of Georgia High School Mathematical Tournament - Hosted by the UGA Department of Mathematics and Math Club for high school students in Georgia and neighboring states. The tournament consists of three challenging rounds: ciphering, written and team collaboration.
- Illinois Council of Teachers of Mathematics State Math Contest - The Illinois Council of Teachers of Mathematics sponsors competitive mathematics events for high school students and in-school contest for grade school students.
- High School Math Contest - Contains contest information and archives of past problems. Competition hosted by the Indiana University Purdue University Indianapolis (IUPUI) Department of Mathematical Sciences.
- Indiana State Mathematics Contest - Annual contest sponsored by the Indiana Council of Teachers of Mathematics. Five testing categories include Pre-Algebra, Algebra, Geometry, Algebra II, and Comprehensive.
- Rose-Hulman High-school Mathematics Contest - Annual contest hosted by the Rose-Hulman Institute of Technology.
- Kentucky MathCounts - Math coaching and competition program for middle school students.
- Louisiana State University Mathematics Contest - Includes contest information, results, photo gallery, as well as problems and solutions from previous contests.
- Johns Hopkins University High School Math Tournament - Conceived in 1998 by Chirag B. Patel, it is one of the largest math competitions for high school students on the Eastern Coast of the USA.
- University of Maryland Math Competition - Open to all high school students in Maryland and the District of Columbia, with past results, problems and solutions.
- Harvard-MIT Mathematics Tournament - An annual math tournament for high school students, held at MIT and at Harvard in alternating years.
- WPI Invitational Math Meet - Annual math meet on the campus of Worcester Polytechnic Institute.
- Math Masters of Minnesota - A team state competition for 5th and 6th graders in Minnesota.
- Minnesota High School Math League - The official website of the Minnesota High School Math League.
- Minnesota Junior High School Mathematics League - Competition for junior high students that meets multiple times per year.
- Minnesota MathCounts - Math coaching and competition program for middle school students. Offers information on state contest and coaching materials for schools throughout Minnesota.
- SCSU Math Contest - Annual event hosted by the St. Cloud State departments of mathematics, statistics, and computer science for students in grades 7-12.
- Great Plains Math League - Sponsors several high school math contests in Missouri, Iowa and Kansas.
- Math Field Day - Annual event hosted by the Southeast Missouri State University. Contains information, results, and sample contests.
- St. Louis Community College - Sponsors the Excellence in Math Contest and Weekly Math Contest.
- New Jersey Math Counts - Math coaching and competition program for middle school students. Offers information on state contest.
- North Carolina State Mathematics Contest - State contest that covers Algebra I, II and Geometry.
- Calculus Competition - Contest open to students at Youngstown State University. Includes a collection of past contest problems.
- OSU High School Math Contest - Open to students in Oklahoma. Modeled after the William Lowell Putnam Mathematical Competition.
- University of South Carolina High School Math Contest - Competition for South Carolina high school students. Sites contains results, statistics, problems and solutions.
- Rice Mathematics Tournament - Contest for high school students from the Texas/Louisiana area. Contain Rules, results, and sample problems.
- Texas MathCounts - Math coaching and competition program for middle school students.
- Virginia Tech Regional Mathematics Contest - Sponsored each fall by the Mathematics Department at Virginia Tech, initially conceived as a regional preliminary contest to the Putnam competition.
- Wisconsin Mathematics, Engineering and Science Talent Search - Open to high school and middle school students in the state of Wisconsin and throughout the world. Contest involves solving five sets of five problems distributed during the school year.

- Canadian Mathematical Olympiad (CMO) - Include results, past problems and solutions.
- Canadian Mathematics Competition - Organization that sponsors the Canadian Open Mathematics Challenge, the Euclid Contest, the Gauss Contest, with online workshop, problem archives, and other resources for students.
- The Canadian Open Mathematics Challenge - Qualifying round for the Canadian Mathematical Olympiad. Site includes registration and past problems.

- Asian Pacific Mathematics Olympiad - Competition regulations, past results, awards, and APMO Test Papers from 1989 to present.
- Balkan Mathematical Olympiad - Mathematical contest for school pupils from the countries situated in the Balkan region.
- British Mathematical Olympiad - The Subtrust (BMOS) and Committee (BMOC) pages with past problems.
- Bulgarian Competitions in Mathematics and Informatics - Introduction to the major national competitions in Bulgaria. Features comprehensive sets of past contest problems.
- Dutch Mathematics Olympiad - Annual mathematics competition for high school students since 1962.
- Flanders Mathematics Olympiad - Arrangements for the competition, posters and lists of questions (English/Flemish).
- The Indian MO-Cell - The headquarters of all Math olympiad related activity in India. Located at the Department of Mathematics of the Indian Institute of Science, Bangalore. Provides information on the Indian National Maths Olympiad and past contest problems.
- Irish Mathematical Olympiad - Team lists, old problems and training details for high school students.
- Mathematical Challenge - A problem solving competition for individual pupils in Scottish secondary and upper primary schools.
- Norwegian Mathematical Olympiad - National contest for the selection of the Norway IMO team. Contains history and problems.
- The Norwegian Mathematical Olympiad - Mathematical problem solving contest named after the world famous Norwegian mathematician Niels Henrik Abel. Includes contest problems in downloadable format.
- Polish Mathematical Olympiad - Math olympiads for Polish high school students. Features problem archives from the Austrian-Polish Mathematics Competition, Baltic Team Contest, Poland Mathematical Olympiad.
- SMS: Singapore Mathematical Olympiad - The largest and oldest mathematics competition in Singapore. Contains schuedule, results, rules, and photo gallery.
- South Africa and the International Mathematical Olympiad - Results, links, training guides and materials.
- South African Mathematics Olympiad - The official national mathematics competition of the country. It is a three round competition with interesting questions and prizes. Site contains background, contest information, past problems, and publications.
- UCT Mathematics Competition - Rules, results, and training materials for the annual competition at the University of Cape Town.