The Professional Cricketers' Association has nominated Northants' Ben Duckett, Durham's Keaton Jennings, Warwickshire's Jeetan Patel and Essex's Graham Napier for Player of the Year.
Batsman Duckett, 21, is also nominated for PCA Young Player of the Year, with the awards given for performances in the County Championship this season.
There are three Women's Player of the Summer nominations - Tammy Beaumont, Natalie Sciver and Lauren Winfield.
The awards dinner is on 29 September.
Kent's Daniel Bell-Drummond, Surrey's Sam Curran and Lancashire's Haseeb Hameed have also been put forward for the young player award.
Duckett, who has been named in England's winter tour squad for Bangladesh, has made 1,338 runs in Division Two this summer, including two double centuries.
South Africa-born opening batsman Jennings, 24, who has been included in the England Lions' winter programme, is the County Championship's leading run-scorer with 1,522 runs in Division One, having hit seven centuries.
New Zealand international spinner Patel, 36, is the leading Championship wicket-taker with 66 Division One victims.
Perennial one-day matchwinner Napier, 36, is set to retire and has enjoyed a fine final Championship season, taking 63 wickets and making 298 runs to help Essex win promotion as Division Two champions.