| Terrestrial ecozone | Forest type | Age (years) | Total | |||||||||||
| 1-20 | 21-40 | 41-60 | 61-80 | 81-100 | 101-120 | 121-140 | 141-160 | 161-180 | 181-200 | 201+ | Other1 | |||
| Taiga Plains | Non-treed | ±0.35 | ±1.96 | ±0.04 | ±4.76 | ±0.63 | - | - | - | - | - | - | ±118.44 | ±118.55 |
| Treed Mixedwood | ±101.72 | ±97.85 | ±78.65 | ±107.10 | ±73.42 | ±209.70 | ±59.59 | ±29.98 | ±14.75 | ±18.28 | ±13.20 | - | ±303.51 | |
| Treed Broadleaf | ±126.63 | ±77.69 | ±81.63 | ±178.82 | ±252.17 | ±102.19 | ±103.21 | ±60.78 | ±18.12 | ±0.63 | - | - | ±386.54 | |
| Treed Coniferous | ±114.52 | ±214.90 | ±319.09 | ±354.92 | ±286.66 | ±857.31 | ±181.29 | ±164.30 | ±91.97 | ±25.56 | ±53.00 | - | ±1 084.44 | |
| Subtotal | ±198.74 | ±248.58 | ±338.62 | ±411.63 | ±388.79 | ±888.48 | ±216.96 | ±177.73 | ±94.89 | ±31.43 | ±54.62 | ±118.44 | ±1 196.50 | |
| Taiga Shield | Treed Broadleaf | ±71.03 | ±43.51 | ±33.44 | ±18.49 | ±29.95 | ±141.71 | ±1.22 | - | - | - | - | - | ±171.41 |
| Treed Mixedwood | ±60.85 | ±51.47 | ±38.51 | ±34.47 | ±38.35 | ±34.07 | ±122.53 | ±8.69 | - | - | - | - | ±163.54 | |
| Non-treed | - | - | ±66.86 | ±8.06 | ±3.16 | - | - | - | - | - | - | ±400.57 | ±406.20 | |
| Treed Coniferous | ±152.04 | ±282.10 | ±379.20 | ±283.85 | ±562.89 | ±653.36 | ±846.24 | ±528.57 | ±26.46 | ±47.31 | ±226.49 | - | ±1 456.20 | |
| Subtotal | ±178.51 | ±290.04 | ±388.42 | ±286.65 | ±565.00 | ±669.42 | ±855.06 | ±528.64 | ±26.46 | ±47.31 | ±226.49 | ±400.57 | ±1 530.25 | |
| Boreal Shield | Non-treed | ±40.64 | ±25.71 | ±19.42 | ±83.95 | ±36.75 | ±45.20 | ±5.83 | ±1.09 | ±2.47 | ±3.01 | ±0.92 | ±527.91 | ±540.25 |
| Treed Broadleaf | ±228.65 | ±237.24 | ±309.76 | ±344.13 | ±311.96 | ±148.82 | ±41.00 | ±16.01 | ±19.11 | ±7.29 | - | - | ±666.90 | |
| Treed Mixedwood | ±302.39 | ±324.10 | ±323.39 | ±406.72 | ±412.43 | ±156.05 | ±74.40 | ±50.14 | ±28.22 | ±10.20 | ±14.06 | - | ±818.58 | |
| Treed Coniferous | ±473.31 | ±789.18 | ±764.19 | ±728.65 | ±759.09 | ±733.70 | ±657.13 | ±217.46 | ±109.33 | ±19.86 | ±10.78 | - | ±1 888.88 | |
| Subtotal | ±607.78 | ±885.88 | ±885.94 | ±906.55 | ±919.23 | ±766.07 | ±662.62 | ±223.74 | ±114.55 | ±23.68 | ±17.74 | ±527.91 | ±2 230.37 | |
| Atlantic Maritime | Non-treed | ±3.30 | ±1.54 | ±2.75 | ±2.34 | ±0.47 | - | - | - | - | - | - | ±92.10 | ±92.24 |
| Treed Broadleaf | ±77.51 | ±91.72 | ±114.26 | ±136.16 | ±112.29 | ±68.30 | ±4.97 | ±9.34 | ±2.42 | - | ±0.41 | - | ±251.81 | |
| Treed Mixedwood | ±124.79 | ±116.22 | ±141.41 | ±155.08 | ±102.41 | ±62.39 | ±12.58 | ±3.06 | - | ±1.15 | - | - | ±296.10 | |
| Treed Coniferous | ±165.01 | ±205.71 | ±159.55 | ±161.53 | ±143.82 | ±85.66 | ±33.44 | ±9.65 | ±1.09 | - | - | - | ±387.72 | |
| Subtotal | ±220.95 | ±253.45 | ±241.91 | ±262.08 | ±209.24 | ±126.07 | ±36.07 | ±13.77 | ±2.66 | ±1.15 | ±0.41 | ±92.10 | ±556.70 | |
| Mixedwood Plains | Non-treed | - | - | - | - | - | - | - | - | - | - | - | ±55.54 | ±55.54 |
| Treed Coniferous | ±22.83 | ±32.57 | ±52.81 | ±25.23 | ±11.93 | ±5.14 | ±2.34 | ±3.66 | - | - | - | - | ±72.08 | |
| Treed Mixedwood | ±18.24 | ±45.52 | ±62.78 | ±55.29 | ±32.97 | ±17.28 | ±5.80 | ±3.90 | - | - | - | - | ±104.11 | |
| Treed Broadleaf | ±19.15 | ±49.47 | ±105.82 | ±97.79 | ±73.47 | ±34.14 | ±15.83 | ±4.58 | ±2.37 | - | - | - | ±174.40 | |
| Subtotal | ±34.94 | ±74.71 | ±133.90 | ±115.14 | ±81.40 | ±38.61 | ±17.02 | ±7.04 | ±2.37 | - | - | ±55.54 | ±222.56 | |
| Boreal Plains | Non-treed | ±26.80 | ±47.23 | ±19.61 | ±8.58 | ±33.51 | ±32.55 | ±2.69 | ±4.56 | - | - | - | ±238.07 | ±249.59 |
| Treed Mixedwood | ±111.95 | ±111.31 | ±133.43 | ±166.93 | ±160.67 | ±123.77 | ±87.19 | ±37.20 | ±17.09 | ±5.59 | ±1.69 | - | ±347.91 | |
| Treed Broadleaf | ±214.21 | ±208.56 | ±286.41 | ±403.71 | ±280.88 | ±179.25 | ±114.47 | ±34.47 | ±8.94 | ±0.95 | - | - | ±678.08 | |
| Treed Coniferous | ±242.22 | ±336.36 | ±365.79 | ±501.23 | ±398.93 | ±351.03 | ±224.15 | ±145.46 | ±109.87 | ±46.34 | ±58.54 | - | ±963.46 | |
| Subtotal | ±343.23 | ±413.83 | ±483.76 | ±664.94 | ±514.76 | ±414.40 | ±266.38 | ±154.12 | ±111.55 | ±46.68 | ±58.56 | ±238.07 | ±1 253.55 | |
| Prairies | Treed Mixedwood | ±4.32 | ±5.21 | ±4.30 | ±3.64 | ±1.67 | ±5.64 | ±0.65 | - | - | - | - | - | ±10.61 |
| Treed Coniferous | ±2.39 | ±19.44 | ±47.56 | ±1.46 | ±4.78 | ±12.72 | ±1.26 | ±4.17 | - | - | - | - | ±53.40 | |
| Non-treed | ±5.67 | ±5.98 | ±0.63 | - | - | - | - | - | - | - | - | ±149.29 | ±149.52 | |
| Treed Broadleaf | ±77.04 | ±137.02 | ±55.13 | ±18.16 | ±15.57 | ±2.72 | - | ±0.16 | - | - | - | - | ±168.31 | |
| Subtotal | ±77.41 | ±138.62 | ±72.94 | ±18.57 | ±16.37 | ±14.17 | ±1.42 | ±4.17 | - | - | - | ±149.29 | ±231.62 | |
| Taiga Cordillera | Non-treed | - | - | ±7.44 | ±38.26 | ±60.78 | - | - | - | - | - | - | ±107.18 | ±129.24 |
| Treed Broadleaf | ±24.18 | ±19.34 | ±14.33 | ±21.77 | ±32.91 | ±0.67 | - | - | - | - | - | - | ±52.17 | |
| Treed Mixedwood | ±6.08 | ±69.49 | ±35.70 | ±22.71 | ±38.46 | ±9.33 | ±33.09 | ±2.18 | ±14.29 | - | - | - | ±97.60 | |
| Treed Coniferous | ±8.05 | ±77.96 | ±219.47 | ±191.01 | ±133.90 | ±109.30 | ±440.66 | ±80.09 | ±37.64 | ±3.51 | - | - | ±568.06 | |
| Subtotal | ±26.20 | ±106.21 | ±222.94 | ±197.33 | ±155.52 | ±109.69 | ±441.90 | ±80.12 | ±40.26 | ±3.51 | - | ±107.18 | ±592.99 | |
| Boreal Cordillera | Non-treed | ±5.31 | ±74.16 | ±93.56 | ±92.27 | ±107.36 | ±67.59 | ±21.07 | ±2.14 | - | - | - | ±156.99 | ±252.95 |
| Treed Broadleaf | ±65.22 | ±80.22 | ±140.53 | ±116.82 | ±61.40 | ±97.95 | ±78.54 | ±36.40 | ±5.39 | ±5.32 | ±4.63 | - | ±254.99 | |
| Treed Mixedwood | ±33.59 | ±52.42 | ±162.80 | ±135.21 | ±120.73 | ±114.62 | ±88.20 | ±92.12 | ±39.11 | ±21.22 | ±60.19 | - | ±313.44 | |
| Treed Coniferous | ±55.42 | ±120.37 | ±273.71 | ±327.91 | ±314.28 | ±428.46 | ±343.34 | ±250.06 | ±214.86 | ±89.47 | ±365.36 | - | ±922.19 | |
| Subtotal | ±92.09 | ±170.80 | ±360.45 | ±384.66 | ±358.67 | ±459.22 | ±363.70 | ±268.97 | ±218.46 | ±92.11 | ±370.31 | ±156.99 | ±1 038.11 | |
| Pacific Maritime | Non-treed | - | - | - | - | - | - | - | - | - | - | - | ±70.99 | ±70.99 |
| Treed Mixedwood | ±12.33 | ±19.38 | ±21.11 | ±42.84 | ±28.42 | ±25.21 | ±10.93 | ±10.23 | ±2.65 | ±0.03 | ±17.70 | - | ±69.25 | |
| Treed Broadleaf | ±2.86 | ±9.90 | ±37.94 | ±25.88 | ±57.53 | ±52.08 | ±10.34 | ±16.01 | ±0.15 | ±9.16 | ±13.65 | - | ±94.19 | |
| Treed Coniferous | ±117.68 | ±165.82 | ±177.95 | ±142.15 | ±97.53 | ±99.75 | ±83.97 | ±96.42 | ±74.54 | ±83.35 | ±570.65 | - | ±683.51 | |
| Subtotal | ±118.36 | ±167.25 | ±183.17 | ±150.70 | ±116.75 | ±115.32 | ±85.30 | ±98.28 | ±74.59 | ±83.85 | ±571.09 | ±70.99 | ±697.06 | |
| Montane Cordillera | Treed Broadleaf | ±5.68 | ±35.49 | ±30.16 | ±49.30 | ±92.85 | ±55.44 | ±44.47 | ±32.49 | ±7.62 | ±12.57 | ±9.26 | - | ±140.22 |
| Treed Mixedwood | ±57.73 | ±60.27 | ±82.90 | ±63.01 | ±105.58 | ±94.71 | ±63.08 | ±59.14 | ±14.20 | ±16.12 | ±11.67 | - | ±214.48 | |
| Non-treed | ±4.15 | ±3.98 | - | ±0.21 | ±9.29 | ±1.96 | ±0.93 | ±0.59 | - | ±0.13 | - | ±325.88 | ±326.07 | |
| Treed Coniferous | ±269.03 | ±275.20 | ±202.53 | ±233.31 | ±349.15 | ±345.04 | ±331.43 | ±319.71 | ±235.04 | ±207.39 | ±576.40 | - | ±1 061.64 | |
| Subtotal | ±275.24 | ±283.98 | ±220.91 | ±246.65 | ±376.51 | ±362.08 | ±340.30 | ±326.76 | ±235.60 | ±208.40 | ±576.59 | ±325.88 | ±1 139.76 | |
| Hudson Plains | Treed Broadleaf | ±22.06 | ±4.46 | ±2.89 | ±12.59 | ±62.44 | ±4.22 | ±1.69 | - | - | - | - | - | ±67.77 |
| Non-treed | - | - | ±0.15 | ±3.75 | ±1.46 | ±0.21 | - | - | - | - | - | ±182.01 | ±182.05 | |
| Treed Mixedwood | ±10.40 | ±16.41 | ±17.55 | ±18.69 | ±20.18 | ±269.11 | ±6.18 | ±1.45 | - | - | - | - | ±271.85 | |
| Treed Coniferous | ±24.66 | ±216.71 | ±258.92 | ±196.12 | ±168.89 | ±239.37 | ±342.62 | ±161.68 | ±10.81 | ±0.48 | - | - | ±618.50 | |
| Subtotal | ±34.69 | ±217.37 | ±259.53 | ±197.45 | ±181.20 | ±360.19 | ±342.68 | ±161.69 | ±10.81 | ±0.48 | - | ±182.01 | ±702.98 | |
| Canada | Non-treed | ±49.58 | ±91.92 | ±118.52 | ±131.17 | ±133.39 | ±87.61 | ±22.04 | ±5.19 | ±2.47 | ±3.01 | ±0.92 | ±851.00 | ±890.14 |
| Treed Broadleaf | ±370.03 | ±381.48 | ±485.14 | ±599.62 | ±528.80 | ±325.63 | ±184.31 | ±88.79 | ±29.53 | ±18.01 | ±17.14 | - | ±1 142.97 | |
| Treed Mixedwood | ±372.43 | ±396.38 | ±435.22 | ±507.95 | ±492.72 | ±429.28 | ±211.91 | ±130.35 | ±57.00 | ±34.37 | ±66.69 | - | ±1 114.04 | |
| Treed Coniferous | ±660.79 | ±1 037.41 | ±1 121.04 | ±1 128.07 | ±1 196.61 | ±1 487.53 | ±1 333.61 | ±762.59 | ±376.41 | ±251.81 | ±921.42 | - | ±3 331.81 | |
| Total | ±845.42 | ±1 177.84 | ±1 302.13 | ±1 381.05 | ±1 404.31 | ±1 584.53 | ±1 363.04 | ±778.75 | ±381.85 | ±254.80 | ±923.99 | ±851.00 | ±3 800.10 | |
| Source: Canada's National Forest Inventory, combined remeasured (2007-2017) and projected (2006-2017 with NFI projection system) data (Version 3.1, October 2025) (http://nfi.nfis.org) | ||||||||||||||
| Note: The Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic), and the Taiga Plains and Hudson Plains ecozones located in Nunavut, are not inventoried. These non-inventoried areas total 262,189.89 thousand ha. | ||||||||||||||
|
1 Missing or unknown age class. |
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