Updated December 2009
| A - B | C - D | E - G | H - K | L - M | N - P | Q - S | T - V | W - Z |
| Last Name | First Name | City | State | Country | Kennel Name |
Date Joined |
| Napotnik | Stephen P. | Elkton | VA | Greiner Hall | 1985 | |
| Nash | Judy A. | Lodi | CA | Ram's Gate Kennel | 1972 | |
| Neel | Roxanne | Cedarpines Park | CA | Kings Mountain Mastiffs | 2007 | |
| Nellessen | Lynn | Deer Park | WA | Chetaka | 1984 | |
| Nelson | Julie | Bothel | WA | Serendipity Mastiffs | 2009 | |
| Nelson | Myra Street - | Lothian | MD | Prairie Buffalo Mastiffs | 1994 | |
| Neumann | Kathy | Watchung | NJ | 2001 | ||
| Nevada | Giselle | Pflugerville | TX | Ever After Mastiffs | 2002 | |
| Newman | Dr. William R. | Bedford | PA | Renrock | 1969 | |
| Nicol | Christina Lynn | Westerville | OH | 1996 | ||
| Nixon | Shelly | Englewood | OH | Druids Keep | 1994 | |
| Noe | Barbara B. | Olive Branch | MS | Silver Moon | 1994 | |
| Nolin | Carrie | Flanders | NJ | 2009 | ||
| Norin | Marlene A. | Woodland Hills | CA | 1994 | ||
| Oberle | Ginny | West Chester | OH | Norginn Mastiffs | 1996 | |
| Ogden | Nancy | Purcellville | VA | Nanjay | 1967 | |
| Ogden | Levi | Purcellville | VA | Nanjay | 1968 | |
| Oifer | Steve | Morganville | NJ | Blackpool | 2007 | |
| Olesen | Shawn | Seattle | WA | 2002 | ||
| Oliphant | Richard | Harbor | OR | 2008 | ||
| Olsen | Laura Lynn | Sandy | OR | Stonehaven Mastiffs | 2005 | |
| Page | Anna | New Windsor | IL | 2007 | ||
| Palace | Louis | Bernardsville | NJ | 1992 | ||
| Papazian | Arleen L. | Howell | MI | Maple Creek Mastiffs | 1987 | |
| Park | Karen | Layton | UT | Manoah Mastiffs | 2006 | |
| Parke | Jean | Alexandria | VA | 2006 | ||
| Parker, MD | John | Louisville | KY | 2007 | ||
| Parkinson | Marie | Lubbock | TX | 1981 | ||
| Patch | Ginette V. | Washington | DC | 1953 | ||
| Patterson | Jennifer | Fayetteville | NC | Crossroads Mastiffs | 2009 | |
| Pavoll | Roberta | Mont Vernon | NH | Gem of Jersey Mastiffs | 1996 | |
| Pearson-May | Susan | McMinnville | OR | 2007 | ||
| Pellicciotti | Keith A. | Mertztown | PA | Mastiff Ranch | 2003 | |
| Pellicciotti | Holly L. | Mertztown | PA | Mastiff Ranch | 2003 | |
| Perkins | Terri | Enterprise | AL | Oso Bodacious Mastiffs | 2005 | |
| Perkins | Lynda | Irrigon | OR | Hearts Desire Mastiff | 1999 | |
| Perrault | Patricia | Dryden | MI | 1991 | ||
| Perry | Patricia | Tucson | AZ | Sherridane | 1999 | |
| Pettry | Karen | Lake Villa | IL | Kharisma Mastiffs | 2000 | |
| Pettry | Chris | Lake Villa | IL | Kharisma Mastiffs | 2005 | |
| Pitas | Nancy | Attleboro | MA | Brookside | 1990 | |
| Plezbert | Tim | Maple Park | IL | Millennium | 1987 | |
| Plunkett | Laura | New Douglas | IL | 2009 | ||
| Pong | Amy | Henderson | NV | 2008 | ||
| Poteat | Robert | Chesnee | SC | Mastiffs of Lakewood | 2006 | |
| Potter, DVM | Sheryl L. | Bloomfield | CT | 1985 | ||
| Powell | Annette | Oak Forest | IL | 2008 | ||
| Prater, DVM | Timmy | Lavergne | TN | 1992 | ||
| Prete | Melissa | Belvidere | IL | Omega Mastiffs | 1989 | |
| Prickett | Susan E. | Lady Lake | FL | Subigre | 1994 | |
| Principe, MD | Ralph F. | Johns Island | SC | 2004 | ||
| Pryor | Jennifer | Twin Lakes | WI | R'negade Mastiffs | 2004 |