| Event | Rank | Mark | By | Meet |
| G-300H | 1 | 42.94 | Dorsey, Miyah (2015) (Belleville East, IL) (US#67) | IL 3A Girls State Finals(IL), 2015-05-23(#1) |
| G-300H | 2 | 43.30 | Coy, Addison (2017) (Barrington, IL) (US#93) | IL 3A Girls State Finals(IL), 2015-05-23(#3) |
| G-300H | 3 | 43.53 | Foy, Tineja (2015) (Crete-Monee, IL) | IL 3A Girls State Finals(IL), 2015-05-23(#4) |
| G-300H | 3 | 43.53 | Stonewall, Chante (2016) (Normal University, IL) | IL 2A Girls State Prelims(IL), 2015-05-22(#1) |
| G-300H | 5 | 43.61 | Neal, Maya (2015) (Neuqua Valley, IL) | Weber Invitational(IL), 2015-05-01(#1) |
| G-300H | 6 | 43.73 | Schulz, Morgan (2015) (Cary-Grove Community, IL) | Gus Scott Co-Ed Invitational(IL), 2015-04-17(#1) |
| G-300H | 7 | 43.78 | Brown, Lajarvia (2016) (Alton, IL) | Southwest Conference Girls Meet(IL), 2015-05-06(#2) |
| G-300H | 8 | 44.39 | Long, Savannah (2016) (DeKalb, IL) | IL 3A Girls State Finals(IL), 2015-05-23(#6) |
| | | National Elites above. State Elites below | | |
| G-300H | 9 | 44.87 | Pierre-Antoine, Alexis (2016) (Lincoln-Way East, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#6) |
| G-300H | 10 | 45.02 | Manning, Courtney (2015) (Normal Community, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#8) |
| G-300H | 11 | 45.40 | Matias, Sabrina (2015) (Lane Technical, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#9) |
| G-300H | 12 | 45.72 | Mccloughan, Janie (2015) (Geneva, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#10) |
| G-300H | 13 | 45.74 | Stanley, Rokelle (2018) (East St. Louis-Senior, IL) | Southwest Conference Girls Meet(IL), 2015-05-06(#3) |
| G-300H | 13 | 45.74 | Schumacher, Tara (2016) (Oswego East, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 15 | 45.81 | Keltee, Lajeanai (2016) (East St. Louis-Senior, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#11) |
| G-300H | 16 | 45.90 | Capel, Sara-Kate (2016) (Barrington, IL) | IL 3A Fremd Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 16 | 45.90 | Boorom, Natalie (2015) (Crystal Lake South, IL) | Fox Valley Girls Conference Meet(IL), 2015-05-07(#1) |
| G-300H | 18 | 45.92 | Samuels, Ingrid (2015) (Springfield, IL) | Springfield Girls City Meet(IL), 2015-04-29(#1) |
| G-300H | 19 | 45.94 | Schmitt, Alexa (2016) (Grayslake Central, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#12) |
| G-300H | 20 | 45.99 | Riedy, Caitlin (2015) (Palatine, IL) | Mid Suburban League Girls Championships(IL), 2015-05-08(#1) |
| G-300H | 21 | 46.09 | Umali, Soren (2017) (Downers Grove South, IL) | IL 3A Downers Grove North Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 22 | 46.12 | Marunde, Devon (2016) (McHenry, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#15) |
| G-300H | 23 | 46.18 | Shodipo, Princess (2015) (Oswego, IL) | Southwest Prairie Girls Conference Meet(IL), 2015-05-07(#2) |
| G-300H | 24 | 46.21 | Enright, Alexandra (2015) (Wheaton-Warrenville South, IL) | DuPage Valley Girls Conference Meet(IL), 2015-05-07(#1) |
| G-300H | 25 | 46.23 | Robinson, Mya (2017) (Thornton Township, IL) | SWSC-Red Girls Conference Meet(IL), 2015-05-07(#1) |
| G-300H | 26 | 46.26 | Manson, Mikaela (2015) (Plainfield East, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 27 | 46.35 | Martinsen, Emily (2017) (Lincoln-Way Central, IL) | SWSC-Red Girls Conference Meet(IL), 2015-05-07(#2) |
| G-300H | 28 | 46.37 | Horton, Charlene (2016) (Thornton Fractional North, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 29 | 46.38 | Woerner, Alison (2017) (Glenwood, IL) | IL 2A Springfield Southeast Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 30 | 46.53 | Kerndl, Angela (2015) (Glenbard East, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 31 | 46.59 | Amarteifio, Remy (2015) (Evanston Township, IL) | Midwest Prep Invitational(IN), 2015-04-18(#3) |
| G-300H | 32 | 46.60 | Hess, Hannah (2015) (Loyola Academy, IL) | IL 3A Loyola Academy Girls Sectional(IL), 2015-05-14(#1) |
| G-300H | 33 | 46.70 | Haugen, Emma (2015) (Lyons Township, IL) | WSC-Silver Girls Conference Meet(IL), 2015-05-09(#1) |
| G-300H | 34 | 46.72 | Schutte, Maggie (2018) (Quincy, IL) | IL 3A O'Fallon Girls Sectional(IL), 2015-05-15(#7) |
| G-300H | 35 | 46.73 | Hall, Imani (2016) (Danville, IL) | Big 12 Girls Conference Meet(IL), 2015-05-08(#2) |
| G-300H | 36 | 46.77 | Gustafson, Hannah (2015) (Mundelein Cons, IL) | North Suburban Girls Conference Meet(IL), 2015-05-07(#1) |
| G-300H | 37 | 46.80 | Kennedy, Cedreahna (2017) (Rock Island, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#22) |
| G-300H | 38 | 46.89 | Gil, Maddy (2016) (Crystal Lake South, IL) | IL 3A Hononegah Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 39 | 46.93 | Mcnichols, Casey (2017) (St. Charles East, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 40 | 46.94 | Tramblay, Macy (2015) (Huntley, IL) | Fox Valley Girls Conference Meet(IL), 2015-05-07(#4) |
| G-300H | 41 | 46.97 | Terry, Erica (2015) (Lakes, IL) | IL 3A Fremd Girls Sectional(IL), 2015-05-15(#5) |
| G-300H | 42 | 47.02 | Rafanan, Jazmine (2016) (Niles West, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#25) |
| G-300H | 43 | 47.05 | Schmidt, Emily (2015) (Huntley, IL) | Woodstock Girls Invitational(IL), 2015-05-01(#2) |
| G-300H | 44 | 47.07 | Clark, Fonda (2015) (Granite City, IL) | IL 3A O'Fallon Girls Sectional(IL), 2015-05-15(#9) |
| G-300H | 45 | 47.26 | Walsh, Caliegh (2016) (Harry D Jacobs, IL) | Fox Valley Girls Conference Meet(IL), 2015-05-07(#5) |
| G-300H | 46 | 47.28 | Temple, Roxanne (2018) (Grant Community, IL) | IL 3A Hononegah Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 47 | 47.32 | Schilb, Hannah (2016) (St. Charles North, IL) | Mike VanDeever Invitational(IL), 2015-04-18(#4) |
| G-300H | 48 | 47.40 | Piotrowski, Julia (2018) (Barrington, IL) | Mid Suburban League Girls Championships(IL), 2015-05-08(#3) |
| G-300H | 48 | 47.40 | Washburn, Louisa (2016) (Yorkville, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 50 | 47.44 | Rinella, Corey (2017) (Palatine, IL) | Mid Suburban League Girls Championships(IL), 2015-05-08(#4) |
| G-300H | 51 | 47.46 | Stewart, Josclyn (2018) (Danville, IL) | John Eakle Invitational(IL), 2015-05-02(#1) |
| G-300H | 52 | 47.49 | Haynes, Jada (2015) (Naperville Central, IL) | DuPage Valley Girls Conference Meet(IL), 2015-05-07(#2) |
| G-300H | 52 | 47.49 | Wink, Julia (2015) (Lyons Township, IL) | IL 3A Girls State Prelims(IL), 2015-05-22(#29) |
| G-300H | 54 | 47.50 | Clark-Jordan, Azana (2016) (Whitney Young, IL) | Mike Rebeck Invitational(IL), 2015-04-18(#1) |
| G-300H | 55 | 47.56 | Underhill, Chena (2016) (Oak Park-River Forest, IL) | IL 3A St. Ignatius Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 55 | 47.56 | Robins, Nicole (2016) (Cary-Grove Community, IL) | IL 3A Hononegah Girls Sectional(IL), 2015-05-14(#7) |
| G-300H | 57 | 47.58 | Pierson, Brianna (2015) (Hononegah, IL) | Mike Rebeck Invitational(IL), 2015-04-18(#2) |
| G-300H | 58 | 47.61 | Raehsler, Ashley (2015) (Lincoln-Way Central, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#6) |
| G-300H | 59 | 47.64 | Glas, Jessica (2016) (St. Charles East, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#3) |
| G-300H | 60 | 47.65 | Forsell, Gabby (2015) (Harlem, IL) | Jennifer Kearns Invitational(IL), 2015-04-11(#3) |
| G-300H | 61 | 47.72 | Jackson, Destinee (2017) (Hoffman Estates, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#4) |
| G-300H | 62 | 47.76 | Kibbe, Gwen (2017) (Waubonsie Valley, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 62 | 47.76 | Wong, Lauren (2016) (Downers Grove South, IL) | IL 3A Downers Grove North Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 64 | 47.90 | Chase, Abbey (2017) (Metea Valley, IL) | Upstate Eight Girls Conference Meet(IL), 2015-05-07(#5) |
| G-300H | 65 | 47.94 | Perry, Kinnidi (2016) (Crete-Monee, IL) | Southland Ath Girls Conference Meet(IL), 2015-05-06(#3) |
| G-300H | 66 | 47.96 | Bernat, Anatasia (2015) (Neuqua Valley, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#6) |
| G-300H | 67 | 48.12 | Campbell, Dejah (2017) (Belleville West, IL) | Collinsville Girls Invitational(IL), 2015-05-01(#4) |
| G-300H | 67 | 48.12 | Mason, Maya (2016) (Prospect, IL) | Conant Girls Twilight Invitational(IL), 2015-05-01(#1) |
| G-300H | 69 | 48.17 | Kendziera, Brenda (2016) (Prospect, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 70 | 48.20 | Bryant, Alex (2016) (Mother McAuley, IL) | GCAC Championships(IL), 2015-05-09(#2) |
| G-300H | 71 | 48.21 | Ryan, Mackenzie (2017) (O'Fallon, IL) | Southwest Conference Girls Meet(IL), 2015-05-06(#6) |
| G-300H | 72 | 48.24 | Lee, Heather (2015) (O'Fallon, IL) | Collinsville Girls Invitational(IL), 2015-05-01(#5) |
| G-300H | 73 | 48.30 | Hetzler, Lauren (2016) (Carl Sandburg, IL) | Palatine Relays(IL), 2015-05-02(#8) |
| G-300H | 74 | 48.34 | Emmerich, Michela (2016) (Deerfield, IL) | IL 3A Loyola Academy Girls Sectional(IL), 2015-05-14(#3) |
| G-300H | 75 | 48.37 | DeJulius, Katie (2018) (Lincoln-Way East, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#8) |
| G-300H | 76 | 48.42 | Roschi, Rachel (2016) (Oswego East, IL) | Southwest Prairie Girls Conference Meet(IL), 2015-05-07(#4) |
| G-300H | 77 | 48.52 | Ataessien, Joelle (2016) (Whitney Young, IL) | CPS Girls Varsity Trials(IL), 2015-05-05(#5) |
| G-300H | 78 | 48.53 | Reagan, Haley (2015) (Moline, IL) | Western Big Six Girls Conference Meet(IL), 2015-05-09(#3) |
| G-300H | 79 | 48.59 | Click, Haley (2017) (Lake Forest, IL) | North Suburban Girls Conference Meet(IL), 2015-05-07(#4) |
| G-300H | 80 | 48.64 | Carroll, Shannon (2015) (Glenbrook South, IL) | IL 3A Loyola Academy Girls Sectional(IL), 2015-05-14(#4) |
| G-300H | 80 | 48.64 | Knight, Kimbreon (2017) (Alton, IL) | Alton Girls Invitational(IL), 2015-04-23(#5) |
| G-300H | 82 | 48.74 | Harris, Autumn (2018) (Edwardsville, IL) | Edwardsville Girls Tiger Relays(IL), 2015-04-15(#6) |
| G-300H | 83 | 48.75 | Youngblood, Kennedy (2018) (Wheaton-Warrenville South, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 84 | 48.79 | Auriemma, Elizabeth (2018) (Plainfield North, IL) | Southwest Prairie Girls Conference Meet(IL), 2015-05-07(#5) |
| G-300H | 85 | 48.81 | McDermott, Maeve (Lyons Township, IL) | IL 3A Lyons Township Girls Sectional(IL), 2015-05-15(#2) |
| G-300H | 86 | 48.82 | Hoff, Elizabeth (2018) (York Community, IL) | WWS Girls Tiger Invitational(IL), 2015-05-01(#6) |
| G-300H | 87 | 48.83 | Jasutis, Becca (2016) (Yorkville, IL) | Matt Wulf Invitational(IL), 2015-04-17(#1) |
| G-300H | 88 | 48.88 | Brown, Daijah (2018) (Plainfield South, IL) | Minooka Girls Invitational(IL), 2015-04-17(#2) |
| G-300H | 88 | 48.88 | O'Connell, Allie (2016) (Grayslake North, IL) | Fox Valley Girls Conference Meet(IL), 2015-05-07(#8) |
| G-300H | 90 | 48.89 | Urbanski, Ola (2015) (Conant, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#6) |
| G-300H | 91 | 49.09 | Ginsberg, Claire (Geneva, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#6) |
| G-300H | 92 | 49.12 | Rogin, Amy (2016) (Highland Park, IL) | CSL-North Girls Conference Meet(IL), 2015-05-07(#2) |
| G-300H | 93 | 49.15 | Taylor, Crea (2016) (Evanston Township, IL) | IL 3A Loyola Academy Girls Sectional(IL), 2015-05-14(#5) |
| G-300H | 93 | 49.15 | O'Connell, Allison (2016) (Grayslake North, IL) | IL 3A Fremd Girls Sectional(IL), 2015-05-15(#7) |
| G-300H | 95 | 49.16 | Harvey, Alexia (2015) (Evanston Township, IL) | Wentzville Holt Invitational(MO), 2015-04-04(#4) |
| G-300H | 96 | 49.17 | Hobbs, Jalyn (2016) (Lincoln-Way Central, IL) | Minooka Girls Invitational(IL), 2015-04-17(#3) |
| G-300H | 97 | 49.19 | Bryant, Alexandria (2016) (Mother McAuley, IL) | Eastern Relays(KY), 2015-04-25(#18) |
| G-300H | 98 | 49.21 | Anthony, Briana (Thornton Township, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#10) |
| G-300H | 99 | 49.22 | Huss, Leah (2015) (Pekin Community, IL) | Metamora Co-Ed Invitational(IL), 2015-04-11(#3) |
| G-300H | 99 | 49.22 | Windisch, Alicia (2015) (Glenwood, IL) | Central State Eight Girls Conference Meet(IL), 2015-05-09(#5) |
| G-300H | 101 | 49.23 | Robinson, Ameilia (2016) (Grayslake North, IL) | Fox Valley Girls Conference Meet(IL), 2015-05-07(#10) |
| G-300H | 102 | 49.30 | Gully, Raina (2017) (Galesburg, IL) | Dunlap Co-Ed Relays(IL), 2015-01-01(#1) |
| G-300H | 103 | 49.35 | Stapleton, Emma (2016) (Hinsdale Central, IL) | WWS Girls Tiger Invitational(IL), 2015-05-01(#8) |
| G-300H | 104 | 49.37 | Lim, Brittney (2016) (Glenbard North, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#8) |
| G-300H | 105 | 49.54 | Orozco, Isabella (2016) (Larkin, IL) | Upstate Eight Girls Conference Meet(IL), 2015-05-07(#8) |
| G-300H | 106 | 49.55 | Henry, Kara (2016) (Normal University, IL) | IL 2A Dunlap Girls Sectional(IL), 2015-05-15(#7) |
| G-300H | 107 | 49.56 | Johnson, Zamiyah (Shepard, IL) | SSC-Red Girls Conference Meet(IL), 2015-05-07(#1) |
| G-300H | 108 | 49.57 | Davis, Natasha (2018) (Edwardsville, IL) | Collinsville Girls Invitational(IL), 2015-05-01(#9) |
| G-300H | 108 | 49.57 | Duncan, Jasmin (2016) (South Elgin, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#8) |
| G-300H | 110 | 49.58 | Andrews, Rajiah (2017) (West Aurora, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#9) |
| G-300H | 111 | 49.62 | Villasin, Angelina (2016) (Prospect, IL) | Bruce Ritter Invitational(IL), 2015-04-17(#4) |
| G-300H | 112 | 49.63 | Bornnard, Tanijah (2017) (O'Fallon, IL) | O'Fallon Girls Invitational(IL), 2015-04-17(#5) |
| G-300H | 113 | 49.66 | Zednick, Madison (2017) (Lincoln-Way East, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#11) |
| G-300H | 114 | 49.69 | Stillabower, Haily (Fenton, IL) | IL 3A Glenbard North Girls Sectional(IL), 2015-05-14(#9) |
| G-300H | 115 | 49.71 | Troemel, Lauren (2017) (Grant Community, IL) | Lake County Girls Championships(IL), 2015-04-30(#6) |
| G-300H | 116 | 49.76 | Bridges, Madison (2017) (Lake Zurich, IL) | IL 3A Fremd Girls Sectional(IL), 2015-05-15(#9) |
| G-300H | 117 | 49.80 | Stazak, Hayley (2017) (Plainfield North, IL) | IL 3A Naperville North Girls Sectional(IL), 2015-05-14(#11) |
| G-300H | 118 | 49.81 | Hasik, Julia (Bradley-Bourbonnais, IL) | SWSC-Red Girls Conference Meet(IL), 2015-05-07(#4) |
| G-300H | 119 | 49.82 | Meinert, Emily (Galesburg, IL) | IL 2A Dunlap Girls Sectional(IL), 2015-05-15(#8) |
| G-300H | 120 | 49.85 | Osabuohien, Sophia (Homewood-Flossmoor, IL) | IL 3A Homewood-Flossmoor Girls Sectional(IL), 2015-05-14(#12) |
| G-300H | 121 | 49.87 | Fisher, Sam (2017) (Prairie Ridge, IL) | Palatine Relays(IL), 2015-05-02(#9) |
| G-300H | 122 | 49.88 | Griffin, D'Meya (Warren Township, IL) | North Suburban Girls Conference Meet(IL), 2015-05-07(#9) |
| G-300H | 123 | 49.90 | Reese, Kelly (2018) (East St. Louis-Senior, IL) | Southwest Conference Girls Meet(IL), 2015-05-06(#1) |
| G-300H | 124 | 49.92 | Doster, Sarah (Streamwood, IL) | IL 3A St. Charles North Girls Sectional(IL), 2015-05-15(#10) |
| G-300H | 125 | 49.94 | Schrauth, Maddie (2018) (Glenbard West, IL) | WSC-Silver Girls Conference Meet(IL), 2015-05-09(#2) |
| G-300H | 125 | 49.94 | Adesola, Victoria (2017) (Simeon Career Academy, IL) | Larry Roland Girls Invitational(IL), 2015-04-07(#3) |
| G-300H | 127 | 49.95 | Reed, Georgia (2018) (Geneva, IL) | Mike VanDeever Invitational(IL), 2015-04-18(#6) |
| G-300H | 128 | 49.98 | Baker, Holly (2015) (DeKalb, IL) | Crystal Lake Central Girls Invitational(IL), 2015-04-17(#3) |
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