| Event | Rank | Mark | By | Meet |
| G-300H | 1 | 42.95 | Cronin, Grace (2016) (Fenwick, IL) (US#69) | IL 3A Girls State Finals(IL), 2015-05-23(#2) |
| | | National Elites above. State Elites below | | |
| G-300H | 2 | 45.28 | Buford, Takyra (2017) (Cahokia, IL) | Alton Girls Invitational(IL), 2015-04-23(#2) |
| G-300H | 3 | 45.67 | Ward, Whitney (2016) (Brooks College Prep Academy, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#2) |
| G-300H | 4 | 45.76 | Bunning, Jordyn (2018) (Vernon Hills, IL) | IL 2A Girls State Finals(IL), 2015-05-23(#3) |
| G-300H | 5 | 45.85 | Salzbrunn, Gianna (2016) (Montini Catholic, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#4) |
| G-300H | 6 | 45.96 | Henry, Lunden (2016) (Springfield Southeast, IL) | Central State Eight Girls Conference Meet(IL), 2015-05-09(#1) |
| G-300H | 7 | 46.26 | Jones, Emma (2015) (Benet Academy, IL) | IL 3A Downers Grove North Girls Sectional(IL), 2015-05-14(#2) |
| G-300H | 8 | 46.28 | Smith, Taylor (2015) (Mattoon, IL) | IL 2A Clinton Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 9 | 46.32 | Hubert, Shaneequa (2016) (Kankakee, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#5) |
| G-300H | 10 | 46.34 | Welter, Aliyah (2018) (Monticello, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#6) |
| G-300H | 11 | 46.39 | Widder, Haley (2015) (Washington Comm, IL) | IL 2A Dunlap Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 12 | 46.43 | Howard, Dontavia (2017) (Springfield Southeast, IL) | Central State Eight Girls Conference Meet(IL), 2015-05-09(#2) |
| G-300H | 13 | 46.67 | Zacharias, Morgan (2015) (Reed-Custer, IL) | IL 1A Girls State Prelims(IL), 2015-05-21(#4) |
| G-300H | 14 | 46.86 | Castillo, Jasmine (2016) (Burlington Central, IL) | Kane County Girls Championships(IL), 2015-04-30(#1) |
| G-300H | 15 | 47.04 | Getz, Leah (2017) (Morton, IL) | IL 2A Dunlap Girls Sectional(IL), 2015-05-15(#3) |
| G-300H | 16 | 47.23 | Lukens, Erin (2015) (Herrin, IL) | IL 2A Triad Girls Sectional(IL), 2015-05-14(#2) |
| G-300H | 17 | 47.37 | Wise, Anna (2015) (Geneseo, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#3) |
| G-300H | 18 | 47.43 | Mayes, Jade (2017) (Westinghouse Career Academy, IL) | IL 3A St. Ignatius Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 19 | 47.47 | Robinson, Ariel (2015) (Rich Central, IL) | IL 2A Kankakee Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 20 | 47.60 | Georgieff, Sarah (2018) (Dunlap, IL) | PJS Honor Roll Meet(IL), 2015-05-26(#4) |
| G-300H | 21 | 47.63 | Arden, Anna (2016) (Antioch, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#12) |
| G-300H | 22 | 47.75 | Wyman, Kelsey (2017) (Monmouth-Roseville, IL) | IL 2A Dunlap Girls Sectional(IL), 2015-05-15(#4) |
| G-300H | 22 | 47.75 | Bolton, Mikayla (2015) (Erie-Prophetstown, IL) | IL 2A Galena Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 24 | 47.78 | Ness, Olivia (2015) (Monticello, IL) | Clinton Co-Ed Meet #3(IL), 2015-04-28(#1) |
| G-300H | 25 | 47.87 | Crosby, Jayla (2018) (Cahokia, IL) | IL 2A Triad Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 26 | 47.88 | Wiegand, Micaela (2016) (Eureka, IL) | Roger Washburn Invitational(IL), 2015-05-01(#1) |
| G-300H | 27 | 48.02 | Ness, Emily (2016) (Sandwich Community, IL) | IL 2A Plano Girls Sectional(IL), 2015-05-15(#1) |
| G-300H | 28 | 48.16 | Leverston, Jamika (2017) (Westinghouse Career Academy, IL) | IL 3A St. Ignatius Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 29 | 48.22 | Reese, Shaunise (2017) (Freeport, IL) | IL 2A Galena Girls Sectional(IL), 2015-05-15(#4) |
| G-300H | 30 | 48.23 | Wilson, Selina (2016) (Canton, IL) | PJS Honor Roll Meet(IL), 2015-05-26(#6) |
| G-300H | 31 | 48.53 | French, Brianna (St. Francis, IL) | Lisle Mega Meet(IL), 2015-04-11(#2) |
| G-300H | 32 | 48.58 | Hocking, Elsie (2015) (Mahomet-Seymour, IL) | Bloomington Lady Raider Invitational, 2015-04-17(#6) |
| G-300H | 33 | 48.59 | Bosman, Hannah (2016) (Timothy Christian, IL) | IL 2A Glenbard South Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 34 | 48.64 | Robinson, Sarah (2017) (LaSalle-Peru, IL) | IL 2A Plano Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 35 | 48.66 | Hartmann, Emily (2015) (Freeburg Community, IL) | IL 2A Triad Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 36 | 48.78 | Beattie, Grace (2016) (Woodstock, IL) | IL 2A Vernon Hills Girls Sectional(IL), 2015-05-15(#3) |
| G-300H | 37 | 48.79 | Polk, Karah (2017) (Rich Central, IL) | IL 2A Kankakee Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 38 | 48.87 | Rimes, Lindsey (2018) (LaSalle-Peru, IL) | IL 2A Plano Girls Sectional(IL), 2015-05-15(#3) |
| G-300H | 39 | 48.93 | Bouie, Khydeshia (2015) (North Lawndale Charter, IL) | IL 2A North Lawndale Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 40 | 48.99 | Marrs, Alyssa (Reed-Custer, IL) | Herscher Invitational(IL), 2015-05-01(#3) |
| G-300H | 41 | 49.01 | Eaves, Taylor (2015) (Kaneland , IL) | IL 2A Galena Girls Sectional(IL), 2015-05-15(#5) |
| G-300H | 42 | 49.24 | Wagner, Jessica (2016) (Champaign Central, IL) | IL 2A Clinton Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 43 | 49.27 | Mund, Logan (Pecatonica, IL) | IL 1A Oregon Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 44 | 49.33 | Weinrich, Bryce (2015) (Burlington Central, IL) | IL 2A Galena Girls Sectional(IL), 2015-05-15(#6) |
| G-300H | 45 | 49.41 | Keyes, Likkaya (2018) (Morgan Park, IL) | Paul Wallace Classic (IL), 2015-01-01(#3) |
| G-300H | 46 | 49.45 | Smith, Taylor (2015) (Rockford Christian, IL) | Matt Wulf Invitational(IL), 2015-04-17(#2) |
| G-300H | 46 | 49.45 | Dixon, Mackenzie (2017) (Mascoutah, IL) | IL 2A Triad Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 48 | 49.51 | Brost, Maddie (2015) (Antioch, IL) | IL 2A Vernon Hills Girls Sectional(IL), 2015-05-15(#4) |
| G-300H | 49 | 49.72 | Elston, Alexis (Thornridge, IL) | IL 2A Kankakee Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 50 | 49.88 | McNicholas, Meagan (2016) (Rochester, IL) | Central State Eight Girls Conference Meet(IL), 2015-05-09(#7) |
| G-300H | 51 | 49.99 | Anglin, Gabrielle (2015) (Metamora, IL) | Mid Illini Girls Conference Meet(IL), 2015-05-07(#5) |
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| | | See more performances for G-300H | | |
