| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2010/2011 | League Two (Scotland) | 24 | — | 2 | 0 | — | — |
| 2011/2012 | League Two (Scotland) | 23 | — | 3 | 0 | — | — |
| 2012/2013 | Premiership | 24 | 2118 | 0 | 0 | 0 | — |
| 2013/2014 | Championship (Scotland) | 32 | — | 4 | 0 | — | — |
| 2014/2015 | Championship (Scotland) | 28 | — | 1 | 2 | — | — |
| 2015/2016 | Championship (Scotland) | 6 | — | 0 | 0 | — | — |
| 2016/2017 | League One (Scotland) | 15 | — | 2 | 0 | — | — |
| 2017/2018 | Championship (Scotland) | 31 | 2744 | 0 | 1 | 0.03 | — |
| 2017/2018 | League One (Scotland) | 9 | 764 | 0 | 0 | 0 | — |
| 2018/2019 | Premiership | 38 | 3416 | 1 | 7 | 0.21 | — |
| 2019/2020 | Premiership | 30 | 2700 | 2 | 1 | 0.1 | 7.31 |
| 2020/2021 | Premiership | 29 | 2454 | 1 | 1 | 0.07 | 7.15 |
| 2021/2022 | Premiership | 22 | 1747 | 0 | 1 | 0.05 | 6.95 |
| 2022/2023 | Premiership | 27 | 1856 | 2 | 0 | 0.1 | 6.85 |
| 2023/2024 | Championship (Scotland) | 26 | 2112 | 0 | 1 | 0.04 | — |
| 2024/2025 | Premiership | 34 | 2892 | 1 | 2 | 0.09 | 7.14 |
| 2025/2026 | Championship (Scotland) | 30 | 2509 | 0 | 3 | 0.11 | 6.33 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-08-06
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Hibernian | 29 | 8 | 6 | 15 | 1 | 0 | 3 | 0 |
 St. Mirren | 29 | 13 | 4 | 12 | 0 | 2 | 4 | 0 |
 St. Johnstone | 25 | 8 | 7 | 10 | 0 | 1 | 3 | 3 |
 Rangers | 24 | 1 | 7 | 16 | 0 | 0 | 5 | 0 |
 Hearts | 21 | 9 | 5 | 7 | 1 | 0 | 6 | 0 |
 Celtic | 20 | 1 | 4 | 15 | 1 | 0 | 5 | 0 |
 Aberdeen | 19 | 5 | 4 | 10 | 2 | 0 | 4 | 1 |
 Kilmarnock | 18 | 5 | 7 | 6 | 0 | 0 | 0 | 0 |
 Ross County | 16 | 6 | 4 | 6 | 2 | 0 | 4 | 0 |
 Motherwell | 15 | 3 | 3 | 9 | 0 | 0 | 5 | 0 |
 Dundee United | 14 | 4 | 5 | 5 | 0 | 0 | 2 | 0 |
 Livingston | 12 | 6 | 3 | 3 | 0 | 0 | 3 | 0 |
 Dunfermline Athletic | 12 | 3 | 5 | 4 | 0 | 0 | 4 | 0 |
 Dundee | 11 | 3 | 3 | 5 | 1 | 0 | 4 | 0 |
 Falkirk | 11 | 3 | 3 | 5 | 0 | 1 | 3 | 0 |
 Queen of the South | 11 | 4 | 4 | 3 | 0 | 0 | 1 | 0 |
 Raith Rovers | 10 | 5 | 1 | 4 | 1 | 0 | 1 | 0 |
 Hamilton Academical | 10 | 4 | 2 | 4 | 0 | 0 | 4 | 0 |
 Partick Thistle | 10 | 5 | 1 | 4 | 0 | 0 | 4 | 0 |
 Inverness CT | 9 | 1 | 5 | 3 | 0 | 0 | 2 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Slovakia | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Kazakhstan | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
 Ukraine | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Republic of Ireland | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Israel | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Netherlands | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Russia | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Luxembourg | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 San Marino | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Serbia | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Declan Gallagher finished the 2025/2026 Championship (Scotland) season with 3 assists and no goals from 30 appearances (2,509 minutes) — 0.11 goal involvements per 90. His average match rating for that season computes to 6.33.
At his best he averaged 7.31 in 2019/2020, Premiership; at his worst, 6.33 in 2025/2026. The direction of late is downward — 0.33 under his prior average over the last two rated seasons.
