G-44
Main production variant, 200 built (serial nos.
1201–1400) including J4F series military variants listed below.

G-44A
Improved postwar production variant with redesigned hull, 76 built (serial nos.
1401–1476.)

J4F-1
G-44 for the United States Coast Guard with three seats, 25 built.

J4F-2
United States Navy version of the J4F-1 with 5-seat interior, 131 built.

OA-14
Fifteen G-44s impressed into wartime service with the United States Army Air Forces.

OA-14A
One new aircraft for the Corps of Engineers.

Gosling I
Fifteen J4F-2s transferred to the Royal Navy, later renamed Widgeon I
SCAN 30
G-44A Licence-built in France using Metric standards and not Anodized as were original Grumman-built aircraft, 41 built (serial nos.
1–41.)

PACE Gannet
Pacific Aerospace Engineering Corporation conversions of S.C.A.N. 30s, powered by 300 hp (220 kW) Lycoming R-680-13 radial engines.
Later known as the Gannet Super Widgeon
G-44
Main production variant, 200 built (serial nos. 1201–1400) including J4F series military variants listed below.
G-44A
Improved postwar production variant with redesigned hull, 76 built (serial nos. 1401–1476.)
J4F-1
G-44 for the United States Coast Guard with three seats, 25 built.
J4F-2
United States Navy version of the J4F-1 with 5-seat interior, 131 built.
OA-14
Fifteen G-44s impressed into wartime service with the United States Army Air Forces.
OA-14A
One new aircraft for the Corps of Engineers.
Gosling I
Fifteen J4F-2s transferred to the Royal Navy, later renamed Widgeon I
SCAN 30
G-44A Licence-built in France using Metric standards and not Anodized as were original Grumman-built aircraft, 41 built (serial nos. 1–41.)
PACE Gannet
Pacific Aerospace Engineering Corporation conversions of S.C.A.N. 30s, powered by 300 hp (220 kW) Lycoming R-680-13 radial engines. Later known as the Gannet Super Widgeon
Grumman G-44 Widgeon