diff --git a/lib/matplotlib/colorbar.py b/lib/matplotlib/colorbar.py
index 1272ac6ff3d8..5e5368ae3f8b 100644
--- a/lib/matplotlib/colorbar.py
+++ b/lib/matplotlib/colorbar.py
@@ -1180,7 +1180,11 @@ def _reset_locator_formatter_scale(self):
self._minorlocator = None
self._formatter = None
self._minorformatter = None
- if (self.boundaries is not None or
+ if (isinstance(self.mappable, contour.ContourSet) and
+ isinstance(self.norm, colors.LogNorm)):
+ # if contours have lognorm, give them a log scale...
+ self._set_scale('log')
+ elif (self.boundaries is not None or
isinstance(self.norm, colors.BoundaryNorm)):
if self.spacing == 'uniform':
funcs = (self._forward_boundaries, self._inverse_boundaries)
diff --git a/lib/matplotlib/tests/baseline_images/test_contour/contour_log_locator.svg b/lib/matplotlib/tests/baseline_images/test_contour/contour_log_locator.svg
new file mode 100644
index 000000000000..a4a397104ef7
--- /dev/null
+++ b/lib/matplotlib/tests/baseline_images/test_contour/contour_log_locator.svg
@@ -0,0 +1,3375 @@
+
+
+
+
+
+
+ 2022-12-11T14:01:58.700972
+ image/svg+xml
+
+
+ Matplotlib v3.6.0.dev2642+g907c10911d.d20221211, https://matplotlib.org/
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diff --git a/lib/matplotlib/tests/test_contour.py b/lib/matplotlib/tests/test_contour.py
index e42206b8cb79..e0ec37f0c8de 100644
--- a/lib/matplotlib/tests/test_contour.py
+++ b/lib/matplotlib/tests/test_contour.py
@@ -8,7 +8,7 @@
assert_array_almost_equal, assert_array_almost_equal_nulp)
import matplotlib as mpl
from matplotlib.testing.decorators import image_comparison
-from matplotlib import pyplot as plt, rc_context
+from matplotlib import pyplot as plt, rc_context, ticker
from matplotlib.colors import LogNorm, same_color
import pytest
@@ -155,6 +155,28 @@ def test_given_colors_levels_and_extends():
plt.colorbar(c, ax=ax)
+@image_comparison(['contour_log_locator.svg'], style='mpl20',
+ remove_text=False)
+def test_log_locator_levels():
+
+ fig, ax = plt.subplots()
+
+ N = 100
+ x = np.linspace(-3.0, 3.0, N)
+ y = np.linspace(-2.0, 2.0, N)
+
+ X, Y = np.meshgrid(x, y)
+
+ Z1 = np.exp(-X**2 - Y**2)
+ Z2 = np.exp(-(X * 10)**2 - (Y * 10)**2)
+ data = Z1 + 50 * Z2
+
+ c = ax.contourf(data, locator=ticker.LogLocator())
+ assert_array_almost_equal(c.levels, np.power(10.0, np.arange(-6, 3)))
+ cb = fig.colorbar(c, ax=ax)
+ assert_array_almost_equal(cb.ax.get_yticks(), c.levels)
+
+
@image_comparison(['contour_datetime_axis.png'], style='mpl20')
def test_contour_datetime_axis():
fig = plt.figure()
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