Earls, Counts | Titles by Rank
- Earls of March and Kinrara
- Earls of Marr
- Earls of Meath
- Earls of Melfort
- Earls of Melrose
- Earls of Menteith
- Earls of Mercia
- Earls of Mexborough
- Earls of Middlesex
- Earls of Middleton
- Earls of Midleton
- Earls of Milltown
- Earls of Minto
- Earls of Moira
- Earls of Monmouth
- Earls of Montaigu e de Clermont
- Earls of Montgomery
- Earls of Montrose
- Earls of Moray
- Earls of Moray-I
- Earls of Moray-III
- Earls of Morley
- Earls of Mornington
- Earls of Morton
- Earls of Mount Charles
- Earls of Mount Edgcumbe
- Earls of Mulgrave
- Earls of Munster
- Earls of Newburgh
- Earls of Norbury
- Earls of Norfolk
- Earls of Normandia
- Earls of Normanton
- Earls of Northampton
- Earls of Northeim
- Earls of Northesk
- Earls of Northumberland
- Earls of Northumbria
- Earls of Northumpton
- Earls of Norwich
- Earls of Nottingham
- Earls of Nottingham-II
- Earls of Nottingham-III
- Earls of O' Donnell von Tyrconnell
- Earls of O' Reilly
- Earls of Offaly
- Earls of Ogle
- Earls of Onslow
- Earls of Orford
- Earls of Orkney