| 1 | 18:27.96 | Mary SullivanWesthampton Beach | Westhampton Beach '05 | Hofstra Women's XC Invitational 2006 | |
| 2 | 18:37.53 | Sarah ConnellyMount Sinai | Mount Sinai '20 | Section XI State Qualifier Meet | 2019 |
| 3 | 18:40.70 | Laura CummingsBay Shore | Bay Shore '05 | Section XI Cross Country | 2004 |
| 4 | 18:42.20 | Katherine LeeShoreham-Wading River | Shoreham-Wading River '18 | Section XI State Qualifier Meet | 2017 |
| 5 | 18:54.54 | Roshni SinghBay Shore | Bay Shore '20 | Section XI State Qualifier Meet | 2018 |
| 6 | 19:03.10 | Katherine SkinnerRiverhead | Riverhead '10 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 7 | 19:09.93 | Kristy LongmanSayville | Sayville '07 | 2006 section XI SQ Girls XC Results | |
| 8 | 19:13.55 | Alexandra DeCiccoSachem East | Sachem East '16 | Section XI Cross Country County Championships | 2014 |
| 9 | 19:14.80 | Erin HaysShoreham-Wading River | Shoreham-Wading River '07 | 2006 section XI SQ Girls XC Results | |
| 10 | 19:15.10 | Brigid BrennanNorthport | Northport '14 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 11 | 19:16.80 | Katie MurphyHauppauge | Hauppauge '17 | Section XI Cross Country County Championships | 2014 |
| 12 | 19:19.20 | Ali FooteWest Islip | West Islip '11 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 13 | 19:19.85 | Callie HoganBay Shore | Bay Shore '07 | 2006 section XI SQ Girls XC Results | |
| 14 | 19:20.94 | Jordyn McDonnellSachem North | Sachem North '19 | Section XI State Qualifier Meet | 2018 |
| 15 | 19:21.80 | Kim MoranBay Shore | Bay Shore '09 | Section 11 Championships | 2008 |
| 16 | 19:26.56 | Suejin AhnWard Melville | Ward Melville '08 | 2006 section XI SQ Girls XC Results | |
| 17 | 19:26.90 | Caroline O'HeaWard Melville | Ward Melville '12 | Section 11 Division Championships | 2008 |
| 18 | 19:27.4 | Briana ShewanWard Melville | Ward Melville '06 | Nassau County Coaches Association Cross Country Invitational | 2003 |
| 19 | 19:28.40 | Mary Liz McCurdyBay Shore | Bay Shore '05 | Section XI Cross Country | 2004 |
| 20 | 19:29.50 | Elise RamirezSachem North | Sachem North '15 | Section XI Cross Country County Championships | 2014 |
| 21 | 19:31.1 | Marissa BanucciCenter Moriches | Center Moriches | Nassau County Coaches Association Cross Country Invitational | 2004 |
| 22 | 19:32.78 | Taylor McClayEastport-South Manor | Eastport-South Manor '17 | Section XI Cross Country County Championships | 2014 |
| 23 | 19:33.25 | Melissa MeroneSachem East | Sachem East '20 | Section XI State Qualifier Meet | 2018 |
| 24 | 19:37.41 | Tiana GuevaraMiller Place | Miller Place '14 | Section XI Cross Country County Championships | 2013 |
| 25 | 19:39.13 | Alexandra HaysShoreham-Wading River | Shoreham-Wading River '17 | Section XI Cross Country County Championships | 2014 |
| 26 | 19:40.57 | Fiona McLoughlinCommack | Commack '20 | Section XI State Qualifier Meet | 2019 |
| 27 | 19:42.00 | Victoria LoweSmithtown West | Smithtown West '12 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 28 | 19:42.61 | Janie TurekMount Sinai | Mount Sinai '11 | Section 11 Championships | 2008 |
| 29 | 19:43.27 | Laura NolanMiller Place | Miller Place '16 | Section XI Cross Country County Championships | 2014 |
| 30 | 19:43.70 | Brittany SheffeyBellport | Bellport '07 | Section XI Cross Country | 2004 |
| 31 | 19:45.0 | Kathryn AllardMiller Place | Miller Place '06 | Nassau County Coaches Association Cross Country Invitational | 2004 |
| 32 | 19:45.53 | Valerie RomeroSachem East | Sachem East '16 | Section XI Cross Country County Championships | 2014 |
| 33 | 19:45.73 | Kaitlyn ChandrikaMount Sinai | Mount Sinai '21 | Section XI State Qualifier Meet | 2018 |
| 34 | 19:46.30 | Sarah ZieveNorthport | Northport '13 | Section 11 Division Championships | 2008 |
| 35 | 19:46.64 | Gianna MarquezDeer Park | Deer Park '22 | Section XI State Qualifier Meet | 2019 |
| 36 | 19:46.70 | Lauren SchmidtBay Shore | Bay Shore '06 | Section XI Cross Country | 2004 |
| 37 | 19:46.80 | Lianne FarberNorthport | Northport '10 | Section 11 Championships | 2008 |
| 38 | 19:47.05 | Veronica SzygalowiczLindenhurst | Lindenhurst '20 | Section XI State Qualifier Meet | 2019 |
| 39 | 19:47.45 | Christina YakaboskiRiverhead | Riverhead '20 | Section XI State Qualifier Meet | 2019 |
| 40 | 19:48.19 | Noreen GuilfoyleMount Sinai | Mount Sinai '18 | Section XI Cross Country County Championships | 2014 |
| 41 | 19:48.40 | Ellen DoughertyRiverhead | Riverhead '05 | Section XI Cross Country | 2004 |
| 42 | 19:48.66 | Grace WeigeleWalt Whitman | Walt Whitman '21 | Section XI State Qualifier Meet | 2019 |
| 43 | 19:49.81 | Jackie ThorneNorthport | Northport '16 | Section XI Cross Country County Championships | 2014 |
| 44 | 19:51.50 | Lindsay KahnPort Jefferson | Port Jefferson '05 | Section XI Cross Country | 2004 |
| 45 | 19:51.70 | Sami ReillyWard Melville | Ward Melville '11 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 46 | 19:51.96 | Briana GrantWard Melville | Ward Melville '21 | Section XI State Qualifier Meet | 2019 |
| 47 | 19:52.50 | Alyssa KnottSmithtown West | Smithtown West '11 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 48 | 19:53.00 | Kathryn SheehanShoreham-Wading River | Shoreham-Wading River '08 | 2006 section XI SQ Girls XC Results | |
| 49 | 19:53.21 | Erin MellyConnetquot | Connetquot '14 | Section XI Cross Country County Championships | 2013 |
| 50 | 19:54.2 | Nicole StaudtRocky Point | Rocky Point '06 | Nassau County Coaches Association Cross Country Invitational | 2004 |
| 51 | 19:54.32 | Jenna NewmanSayville | Sayville '19 | Section XI State Qualifier Meet | 2018 |
| 52 | 19:54.42 | Josephine CritchleyWest Babylon | West Babylon '21 | Section XI State Qualifier Meet | 2018 |
| 53 | 19:54.43 | Faith ReynoldsWard Melville | Ward Melville '15 | Section XI Cross Country County Championships | 2014 |
| 54 | 19:55.61 | Kaitlyn DeYulioCommack | Commack '19 | Section XI State Qualifier Meet | 2018 |
| 55 | 19:56.10 | Stephanie BarnesBay Shore | Bay Shore '09 | Section 11 Division Championships | 2008 |
| 56 | 19:56.61 | Laura BarrecaMiller Place | Miller Place '15 | Section XI Cross Country County Championships | 2014 |
| 57 | 19:57.66 | Jackie AmatoWesthampton Beach | Westhampton Beach '21 | Section XI State Qualifier Meet | 2018 |
| 58 | 20:00.13 | Lindsey DodenhoffSachem East | Sachem East '19 | Section XI State Qualifier Meet | 2018 |
| 59 | 20:00.48 | Lauren TrejoSachem East | Sachem East '21 | Section XI State Qualifier Meet | 2019 |
| 60 | 20:00.60 | Erin NevilleCommack | Commack '14 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 61 | 20:01.00 | Allison ReidNorthport | Northport '22 | Section XI State Qualifier Meet | 2019 |
| 62 | 20:02.80 | Brittany CarterWesthampton Beach | Westhampton Beach '05 | Section XI Cross Country | 2004 |
| 63 | 20:03.52 | Victoria LaguerreWard Melville | Ward Melville '22 | Section XI State Qualifier Meet | 2019 |
| 64 | 20:03.55 | Mackenzie ColemanSachem North | Sachem North '16 | Section XI Cross Country County Championships | 2014 |
| 65 | 20:04.30 | Marissa BanducciCenter Moriches | Center Moriches '07 | Section XI Cross Country | 2004 |
| 66 | 20:04.44 | Mary Kate AnselminiWard Melville | Ward Melville '11 | Section 11 Championships | 2008 |
| 67 | 20:06.13 | Ava VaccarellaMattituck | Mattituck '23 | Section XI State Qualifier Meet | 2018 |
| 68 | 20:07.70 | Mary Kate AnselminWard Melville | Ward Melville '11 | Section 11 Division Championships | 2008 |
| 69 | 20:07.89 | Sydney CarpenterBay Shore | Bay Shore '20 | Section XI State Qualifier Meet | 2019 |
| 70 | 20:09.44 | Ryleigh DoneganCenter Moriches | Center Moriches '15 | Section XI Cross Country County Championships | 2014 |
| 71 | 20:09.60 | Kathryn GlynnBay Shore | Bay Shore '11 | Section 11 Division Championships | 2008 |
| 72 | 20:10.92 | Emily GintySmithtown East | Smithtown East '20 | Section XI State Qualifier Meet | 2019 |
| 73 | 20:11.21 | Rebecca ClackettHauppauge | Hauppauge '20 | Section XI State Qualifier Meet | 2019 |
| 74 | 20:11.32 | Nolan LauraMiller Place | Miller Place '16 | Section XI Cross Country County Championships | 2013 |
| 75 | 20:11.80 | Wendy ZhangWard Melville | Ward Melville '10 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 76 | 20:12.58 | Kelly AbbateNorthport | Northport '10 | Section 11 Championships | 2008 |
| 77 | 20:13.04 | Bridget ReillyWard Melville | Ward Melville '07 | 2006 section XI SQ Girls XC Results | |
| 78 | 20:13.53 | Molly DearieWard Melville | Ward Melville '15 | Section XI Cross Country County Championships | 2014 |
| 79 | 20:13.68 | Molly RamirezSachem North | Sachem North '20 | Section XI State Qualifier Meet | 2019 |
| 80 | 20:13.79 | Kristen WojtuniakLongwood | Longwood '08 | 2006 section XI SQ Girls XC Results | |
| 81 | 20:13.88 | Danelle RoseMiller Place | Miller Place '20 | Section XI State Qualifier Meet | 2019 |
| 82 | 20:14.20 | Lisa PelligrinoCommack | Commack '10 | Section 11 Division Championships | 2008 |
| 83 | 20:14.21 | Francesca LillyShoreham-Wading River | Shoreham-Wading River '19 | Section XI Cross Country County Championships | 2014 |
| 84 | 20:14.30 | Jennifer FilibertoNorthport | Northport '05 | Section XI Cross Country | 2004 |
| 85 | 20:14.34 | Mariah Jno-CharlesBellport | Bellport '15 | Section XI Cross Country County Championships | 2013 |
| 86 | 20:14.70 | Michelle GayeHarborfields | Harborfields '11 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 87 | 20:14.78 | Nicole GarciaShoreham-Wading River | Shoreham-Wading River '20 | Section XI State Qualifier Meet | 2019 |
| 88 | 20:15.48 | Ava EngstromEast Hampton | East Hampton '21 | Section XI State Qualifier Meet | 2018 |
| 89 | 20:15.50 | Danielle KaragannisNorthport | Northport '06 | Section XI Cross Country | 2004 |
| 90 | 20:15.96 | Gabrielle SchneiderSmithtown East | Smithtown East '19 | Section XI State Qualifier Meet | 2018 |
| 91 | 20:16.34 | Talia GuevaraMiller Place | Miller Place '14 | Section XI Cross Country County Championships | 2013 |
| 92 | 20:16.98 | Suzie PetrykHuntington | Huntington '15 | Section XI Cross Country County Championships | 2014 |
| 93 | 20:17.68 | Meaghan LucieSt. John the Baptist | St. John the Baptist '07 | 2006 Suffolk Coaches Girls XC Results | 2006 |
| 94 | 20:18.77 | Dominique BetterbedMiller Place | Miller Place '15 | Section XI Cross Country County Championships | 2014 |
| 95 | 20:18.77 | Dominique BetterbeMiller Place | Miller Place '15 | Section XI Cross Country County Championships | 2014 |
| 96 | 20:19.28 | Anna GansrowEastport-South Manor | Eastport-South Manor '24 | Section XI State Qualifier Meet | 2019 |
| 97 | 20:20.25 | Sarah HardieJohn Glenn | John Glenn '14 | Section XI Cross Country County Championships | 2013 |
| 98 | 20:20.50 | Paige KoenigSmithtown East | Smithtown East '12 | Section XI Division Championships 2009 - GIRLS Results | 2009 |
| 99 | 20:20.70 | Kaela MahonWard Melville | Ward Melville '05 | Section XI Cross Country | 2004 |
| 100 | 20:21.50 | Kaitlyn OhrtmanShoreham-Wading River | Shoreham-Wading River '16 | Section XI Cross Country County Championships | 2014 |
