Kejuaraan Formula Tiga Inggris musim 1981 (dikenal sebagai Kejuaraan F3 Inggris Marlboro 1981 karena alasan sponsor) adalah musim ke-31 dari Kejuaraan Formula Tiga Inggris. Musim dimenangkan oleh Jonathan Palmer mengemudi untuk West Surrey Racing dengan memakai mobil Ralt RT3 (Toyota). Dia menyelesaikan musim dengan 126 poin dan 7 kemenangan di atas pembalap Belgia Thierry Tassin dengan 91 poin (5 kemenangan), dan pembalap Brasil Raul Boesel dengan 80 poin (3 kemenangan).^[1]

Ronde	Sirkuit	Tanggan	Pole Position	Pembalap pemenang	Tim pemenang
1	Silverstone	1 Maret	Jonathan Palmer	Jonathan Palmer	West Surrey Racing
2	Thruxton	8 Maret	David Sears	Jonathan Palmer	West Surrey Racing
3	Silverstone	29 Maret	Mike White	Jonathan Palmer	West Surrey Racing
4	Mallory Park	12 April	Mike White	Jonathan Palmer	West Surrey Racing
5	Thruxton	20 April	David Leslie	Thierry Tassin	Neil Trundle Racing
6	Thruxton	4 Mei	Raul Boesel	Mike White	Autowindscreens/March Engineering
7	Snetterton	10 Mei	James Weaver	James Weaver	Eurosports Management/Team Tiga
8	Silverstone	25 Mei	Raul Boesel	Thierry Tassin	Neil Trundle Racing
9	Cadwell Park	14 Juni	Jonathan Palmer	Jonathan Palmer	West Surrey Racing
10	Silverstone	21 Juni	Roberto Moreno	Mauro Baldi	Euroracing
11	Silverstone	5 Juli	Jonathan Palmer	Raul Boesel	Murray Taylor Racing
12	Brands Hatch	12 Juli	Dave Scott	Thierry Tassin	Neil Trundle Racing
13	Silverstone	18 Juli	Thierry Tassin	Thierry Tassin	Neil Trundle Racing
14	Mallory Park	2 Agustus	Raul Boesel	Roberto Moreno	Barron Racing
15	Oulton Park	15 Agustus	Jonathan Palmer	Raul Boesel	Café do Brasil
16	Silverstone	31 Agustus	Dave Scott	Dave Scott	Swift Caravans/Mint Engineering
17	Oulton Park	27 September	Thierry Tassin	Jonathan Palmer	West Surrey Racing
18	Silverstone	4 Oktober	Jonathan Palmer	Raul Boesel	Café do Brasil
19	Snetterton	11 Oktober	Jonathan Palmer	Jonathan Palmer	West Surrey Racing
20	Thruxton	25 Oktober	Dave Scott	Thierry Tassin	Neil Trundle Racing

Pos.	Pembalap	Tim	Poin
1	Jonathan Palmer	West Surrey Racing	126
2	Thierry Tassin	Neil Trundle Racing	91
3	Raul Boesel	Murray Taylor Racing	80
4	Mike White	March Engineering	38
5	David Leslie	Eddie Jordan Racing	27
6	Dave Scott	Mint Engineering	26
7	James Weaver	Team Tiga	21
8	Cliff Hansen	Team Tiga	13
9	Kurt Thiim	Gerard Racing	12
10	Michael Bleekemolen	Barron Racing	11
11	Roberto Moreno	Barron Racing	10
12	Fred Krab	David Price Racing	9
13	David Sears	Eddie Jordan Racing	7
13	Richard Trott	Richard Trott Racing	7
13	Bengt Trägårdh	David Price Racing	7
16	Shuroko Sasaki	Shuroko Sasaki	5
17	Toshio Suzuki	March Engineering	3
18	Mike Blanchet	Roy Kennedy Racing	2
19	Victor Rosso	Argentina Racing	2
20	David Coyne	Rushbrooke Racing	1

^[2][3]