The International Science and Engineering Fair began as the National Science Fair in 1950 and has been an international fair since 1958 when Japan, Canada, and Germany joined the competition. Now ISEF boasts over 80 participating countries, regions and territories.
2024: Los Angeles, CAÂ – Affiliated Fairs: 3747, Finalists: 1,660
2023: Dallas, TX – Affiliated Fairs: 372, Finalists: 1,638
2022: Atlanta, GA – Affiliated Fairs: 390, Finalists: 1,750
2021: Virtual – Affiliated Fairs: 389, Finalists: 1,834
2020: Virtual – Affiliated Fairs: 423, Finalists: 1,351
2019: Phoenix, AZ – Affiliated Fairs: 423, Finalists: 1,837
2018: Pittsburgh, PA – Affiliated Fairs: 420, Finalists: 1,769
2017: Los Angeles, CA – Affiliated Fairs: 421, Finalists: 1,774
2016: Phoenix, AZ – Affiliated Fairs: 419, Finalists: 1,759
2015: Pittsburgh, PA – Affiliated Fairs: 422, Finalists: 1,702
2014: Los Angeles, CA – Affiliated Fairs: 426, Finalists: 1,748
2013: Phoenix, AZ – Affiliated Fairs: 436, Finalists: 1,581
2012: Pittsburgh, PA – Affiliated Fairs: 446, Finalists: 1,530
2011: Los Angeles, CA – Affiliated Fairs: 443, Finalists: 1,511
2010: San Jose, CA – Affiliated Fairs: 559, Finalists: 1,594
2009: Reno, NV – Affiliated Fairs: 550, Finalists: 1,502
2008: Atlanta, GA – Affiliated Fairs: 553, Finalists: 1,529
2007: Albuquerque, NM – Affiliated Fairs: 556, Finalists: 1,492
2006: Indianapolis, IN – Affiliated Fairs: 558, Finalists: 1,470
2005: Phoenix, AZ – Affiliated Fairs: 556, Finalists: 1,419
2004: Portland, OR – Affiliated Fairs: 543, Finalists: 1,409
2003: Cleveland, OH – Affiliated Fairs: 518, Finalists: 1,279
2002: Louisville, KY – Affiliated Fairs: 493, Finalists: 1,259
2001: San Jose, CA – Affiliated Fairs: 490, Finalists: 1,230
2000: Detroit, MI – Affiliated Fairs: 502, Finalists: 1,224
1999: Philadelphia, PA – Affiliated Fairs: 477, Finalists: 1,159
1998: Fort Worth, TX – Affiliated Fairs: 454, Finalists: 1,125
1997: Louisville, KY – Affiliated Fairs: 440, Finalists: 1,089
1996: Tucson, AZ – Affiliated Fairs: 482, Finalists: 1,067
1995: Hamilton, Canada – Affiliated Fairs: 481, Finalists: 1,028
1994: Birmingham, AL – Affiliated Fairs: 431, Finalists: 929
1993: Mississippi Beach, MS – Affiliated Fairs: 416, Finalists: 831
1992: Nashville, TN – Affiliated Fairs: 394, Finalists: 753
1991: Orlando, FL – Affiliated Fairs: 395, Finalists: 748
1990: Tulsa, OK – Affiliated Fairs: 398, Finalists: 754
1989: Pittsburgh, PA – Affiliated Fairs: 395, Finalists: 746
1988: Knoxville, TN – Affiliated Fairs: 381, Finalists: 721
1987: San Juan, Puerto Rico – Affiliated Fairs: 360, Finalists: 680
1986: Fort Worth, TX – Affiliated Fairs: 352, Finalists: 656
1985: Shreveport/Bossier, LA – Affiliated Fairs: 334, Finalists: 613
1984: Columbus, OH – Affiliated Fairs: 314, Finalists: 581
1983: Albuquerque, NM – Affiliated Fairs: 305, Finalists: 560
1982: Houston, TX – Affiliated Fairs: 288, Finalists: 525
1981: Milwaukee, WI – Affiliated Fairs: 264, Finalists: 481
1980: St. Paul, MN – Affiliated Fairs: 255, Finalists: 458
1979: San Antonio, TX – Affiliated Fairs: 252, Finalists: 458
1978: Orange County, CA – Affiliated Fairs: 248, Finalists: 451
1977: Cleveland, OH – Affiliated Fairs: 230, Finalists: 416
1976: Denver, CO – Affiliated Fairs: 227, Finalists: 407
1975: Oklahoma City, OK – Affiliated Fairs: 220, Finalists: 396
1974: Notre Dame, IN – Affiliated Fairs: 214, Finalists: 379
1973: San Diego, CA – Affiliated Fairs: 217, Finalists: 374
1972: New Orleans, LA – Affiliated Fairs: 208, Finalists: 378
1971: Kansas City, MO – Affiliated Fairs: 215, Finalists: 399
1970: Baltimore, MD – Affiliated Fairs: 219, Finalists: 404
1969: Fort Worth, TX – Affiliated Fairs: 214, Finalists: 391
1968: Detroit, MI – Affiliated Fairs: 226, Finalists: 415
1967: San Francisco, CA – Affiliated Fairs: 228, Finalists: 425
1966: Dallas, TX – Affiliated Fairs: 225, Finalists: 419
1965: St. Louis, MO – Affiliated Fairs: 221, Finalists: 418
1964: Baltimore, MD – Affiliated Fairs: 222, Finalists: 419
1963: Albuquerque, NM – Affiliated Fairs: 219, Finalists: 411
1962: Seattle, WA – Affiliated Fairs: 208, Finalists: 387
1961: Kansas City, MO – Affiliated Fairs: 200, Finalists: 385
1960: Indianapolis, IN – Affiliated Fairs: 193, Finalists: 356
1959: Hartford, CT – Affiliated Fairs: 168, Finalists: 320
1958: Flint, MI – Affiliated Fairs: 146, Finalists: 281
1957: Los Angeles, CA – Affiliated Fairs: 122, Finalists: 233
1956: Oklahoma City, OK – Affiliated Fairs: 110, Finalists: 213
1955: Cleveland, OH – Affiliated Fairs: 71, Finalists: 136
1954: Lafayette, IN – Affiliated Fairs: 50, Finalists: 95
1953: Oak Ridge, TN – Affiliated Fairs: 30, Finalists: 71
1952: Washington, DC – Affiliated Fairs: 19, Finalists: 42
1951: St. Louis, MO – Affiliated Fairs: 15, Finalists: 30
1950: Philadelphia, PA – Affiliated Fairs: 13, Finalists: 30