LOIRE-ATLANTIQUE (44) :
6 815 Km2
Altitudes mini-maxi : 0-115 m
Pop.: 1 187 900
Administrative City : NANTES
Pop.: 278 800 (Rank 6)
  MAINE-ET-LOIRE (49) :
7 166 Km2
Altitudes mini-maxi : 30-210 m
Pop.: 748 400
Administrative City : ANGERS
Pop.: 152 800 (Rank 17)

 MAYENNE (53) :
5 175 Km2
Altitudes mini-maxi : 20-385 m
Pop.: 298 800
Administrative City : LAVAL
Pop.: 51 400 (Rank 94)

 SARTHE (72) :
6 206 Km2
Altitudes mini-maxi : 20-340 m
Pop.: 542 500
Administrative City : LE MANS
Pop.: 148 000 (Rank 19)

 VENDEE (85) :
6720 km2
Altitudes mini-maxi : 0-290 m
Pop.: 556 600
Administrative City :
LA ROCHE-SUR-YON
Pop.: 50 300 (Rank 96)