American Masters Half-Marathon Road Records
| pending | |
| women-only |
Men
| Division | Performance | Name | Location | Date |
| 40-44 | 1:02:00 | Bernard Lagat (42) | Houston, TX | 2018-Jan-14 |
| 45-49 | 1:08:05 | Bill Rodgers (45) | Kansas City, MO | 1993-Jun-06 |
| 45-49 | 1:05:16 (p) | Kevin Castille (45) | Akron, OH | 2017-Sep-23 |
| 45-49 | 1:05:11 (p) | Kevin Castille (45) | Houston, TX | 2018-Jan-14 |
| 50-54 | 1:09:30 | Norm Green (52) | Philadelphia, PA | 1984-Sep-16 |
| 55-59 | 1:10:23 | Norm Green (55) | Philadelphia, PA | 1987-Sep-20 |
| 60-64 | 1:16:55 | Norm Green (61) | Philadelphia, PA | 1993-Sep-19 |
| 60-64 | 1:16:54 (p) | Brian Pilcher (60) | Chicago, IL | 2016-Oct-09 |
| 65-69 | 1:23:50 | Michael Bertolini (65) | Philadelphia, PA | 1985-Sep-15 |
| 70-74 | 1:25:05 | Gene Dykes (70) | Philadelphia, PA | 2018-Nov-17 |
| 75-79 | 1:30:19 | Warren Utes (76) | Indianapolis, IN | 1997-May-02 |
| 80-84 | 1:39:28 | John Keston (80) | St. Cloud, MN | 2005-Apr-16 |
| 85-89 | 2:52:26 (p) | Jerry Johncock (88) | Saginaw, MI | 2016-Apr-24 |
Women
| Division | Performance | Name | Location | Date |
| 40-44 | 1:09:36 | Deena Kastor (41) | Philadelphia, PA | 2014-Sep-21 |
| 45-49 | 1:13:32 | Linda Somers Smith (49) | San Jose, CA | 2010-Oct-03 |
| 50-54 | 1:15:18 | Linda Somers Smith (50) | Los Angeles, CA | 2011-Oct-30 |
| 55-59 | 1:21:14 | Jenny Hitchings (55) | Sacramento, CA | 2018-Oct-07 |
| 60-64 | 1:28:26 | Kathryn Martin (60) | Philadelphia, PA | 2011-Nov-19 |
| 65-69 | 1:33:37 (f) | Kathryn Martin (65) | New York, NY | 2017-Apr-30 |
| 70-74 | 1:47:38 | Barbara Miller (73) | Clarksburg, CA | 2012-Nov-11 |
| 70-74 | 1:42:03 (p) | S Rae Baymiller (70) | New York, NY | 2013-Oct-06 |
| 70-74 | 1:44:43 (p) | Jan Holmquist (70) | New Bedford, MA | 2015-Mar-15 |
| 70-74 | 1:47:18 (p) | Nancy Rollins (70) | Door County, WI | 2017-May-06 |
| 70-74 | 1:39:53 (p) | Jeannie Rice (70) | Chicago, IL | 2018-Oct-07 |
| 70-74 | 1:38:42 (p) | Jeannie Rice (70) | Naples, FL | 2019-Jan-19 |
| 75-79 | 1:45:52 | Libby James (76) | Orlando, FL | 2012-Jan-13 |
| 80-84 | 2:21:20 | Lynne Hurrell (80) | San Jose, CA | 2014-Oct-05 |
| 80-84 | 2:14:58 (p) | Anne Garrett (80) | Portland, ME | 2014-Oct-05 |
| 80-84 | 2:17:34 (p) | Ginette Bedard (81) | New York, NY | 2014-Oct-05 |
| 80-84 | 2:13:23 (p) | Anne Garrett (80) | Huntington Beach, CA | 2015-Feb-01 |
| 85-89 | 2:42:57 | Margaret Davis (86) | Carlsbad, CA | 2008-Nov-25 |