Kristoffer Ajer
Brentford

Kristoffer Ajer

Kristoffer Ajer of Brentford was born in Rælingen, Norway on 17 April 1998 (age 27).

Kristoffer Ajer
Kristoffer Ajer · Photo: Vagelis Georgariou

Kristoffer Ajer, born on 17 April 1998 in Norway, is a robust defender known for his central defensive role at Brentford. Standing tall at 6ft 5in (1.96m), and weighing a robust 13st 3lb (84kg), he has become a reliable presence at the back, typified by his number 20 jersey. As a testament to his talent, Ajer also represents his native Norway on the international stage.

Following the figures provided by Transfermarkt, Ajer's current valuation sits around £15.5m. His contract with Brentford is set to run until 30 June 2028.

Ajer started his career at Start in the OBOS-ligaen in Norway as a trainee in January 2014. He quickly advanced through the ranks, making a notable 13 first team appearances and managing to secure a goal in his debut season. Over the course of the following campaigns, he racked up a total of 39 league appearances, scoring an impressive eight goals.

The Norwegian caught the eye of Scottish giants Celtic, resulting in a transfer to the Premiership club in July 2016 for a fee of approximately £750k. Ajer adapted well to Scottish football, improving his performances with each passing season. His time in the Hoops saw him making significant strides, notably making 28 first team league appearances and scoring three goals in the 2019-2020 season and 35 league appearances with two goals the following season.

During his time at Celtic, Ajer had a brief stint at Kilmarnock on loan in 2017 and returned to Celtic the same year. However, it was his performances during his second spell at Celtic that truly set him apart. He delivered consistently and undeniably played a crucial role in many pivotal matches for the club.

With a stellar CV and rising profile, Ajer captured the attention of Brentford, a Premier League club in England. In July 2021, he made the move south for a stately sum of £14m. Since his arrival, Ajer has continued to impress, making consistent appearances for Brentford and even finding the back of the net on a few occasions.

Despite his club commitments, Ajer has shown his dedication to his national side through his involvement in significant tournaments. He featured in the League Cup for Brentford, World Cup Qualifiers Europe and the Nations League for Norway, among others.

This player profile is regularly updated with new stats and analysis throughout the season. Last updated 7 May 2025. Send feedback

Kristoffer Ajer stats

Check out all of the statistics about Kristoffer Ajer.

Central Defender
Primary Position
Defender
Position
Kristoffer Ajer
CD
1.96m (6ft 5in)
Height
20
Squad Number
84kg (13st 3lb)
Weight
17 April 1998 (age 27)
Date of Birth
Rælingen
Birthplace
Norway 🇳🇴
Country of Birth
Brentford
Team
Norway 🇳🇴
National Team
£15m (via Transfermarkt)
Market Value
30 June 2028 (3y 1m)
Contract Expires

Season stats

Team
Brentford
Brentford
Premier League 2024 - 2025
Games
24
Starting
17
Substitute
7
Unused
14
Utilisation
63%
Goals
-
Yellows
5
Reds
-
Team
Brentford
Brentford
League Cup 2024 - 2025
Games
1
Starting
1
Substitute
-
Unused
3
Utilisation
25%
Goals
-
Yellows
-
Reds
-
Team
Norway 🇳🇴
World Cup Qualifiers Europe 2024 - 2026
Games
2
Starting
2
Substitute
-
Unused
-
Utilisation
100%
Goals
1
Yellows
1
Reds
-
Team
Norway 🇳🇴
Euro Qualifiers 2022 - 2024
Games
4
Starting
3
Substitute
1
Unused
4
Utilisation
50%
Goals
-
Yellows
1
Reds
-
Team
Norway 🇳🇴
Nations League 2024 - 2025
Games
2
Starting
2
Substitute
-
Unused
4
Utilisation
33%
Goals
-
Yellows
-
Reds
-

Career stats

Team
Brentford
Brentford
Season 2024 - 2025
Country
England 🏴󠁧󠁢󠁥󠁮󠁧󠁿
Games
24
Goals
-
Team
Brentford
Brentford
Season 2023 - 2024
Country
England 🏴󠁧󠁢󠁥󠁮󠁧󠁿
Games
28
Goals
2
Team
Brentford
Brentford
Season 2022 - 2023
Country
England 🏴󠁧󠁢󠁥󠁮󠁧󠁿
Games
9
Goals
-
Team
Brentford
Brentford
Season 2021 - 2022
Country
England 🏴󠁧󠁢󠁥󠁮󠁧󠁿
Games
24
Goals
1
Team
Celtic
Celtic
Season 2020 - 2021
Country
Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Games
35
Goals
2
Team
Celtic
Celtic
Season 2019 - 2020
Country
Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Games
28
Goals
3
Team
Celtic
Celtic
Season 2018 - 2019
Country
Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Games
28
Goals
-
Team
Celtic
Celtic
Season 2017 - 2018
Country
Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Games
24
Goals
-
Team
Kilmarnock
Kilmarnock
Season 2016 - 2017
Country
Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿
Games
16
Goals
-
Team
Start
Start
Season 2016
Country
Norway 🇳🇴
Games
11
Goals
-
Team
Start
Start
Season 2015
Country
Norway 🇳🇴
Games
28
Goals
8
Team
Start
Start
Season 2014
Country
Norway 🇳🇴
Games
13
Goals
1

Transfers

Team
Brentford
Brentford
21 July 2021
From
Celtic
Celtic
Type
Fee (£14m)
Team
Celtic
Celtic
1 July 2017
From
Kilmarnock
Kilmarnock
Type
Returned from loan
Team
Kilmarnock
Kilmarnock
20 January 2017
From
Celtic
Celtic
Type
Loan
Team
Celtic
Celtic
1 July 2016
From
Start
Start
Type
Fee (£750k)
Team
Start
Start
1 January 2014
Type
Trainee

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