diff --git a/src/libraries/System.Text.Json/src/System/Text/Json/Schema/JsonSchemaExporter.cs b/src/libraries/System.Text.Json/src/System/Text/Json/Schema/JsonSchemaExporter.cs
index 00c39aa3ef2821..9126b2a581a8d7 100644
--- a/src/libraries/System.Text.Json/src/System/Text/Json/Schema/JsonSchemaExporter.cs
+++ b/src/libraries/System.Text.Json/src/System/Text/Json/Schema/JsonSchemaExporter.cs
@@ -447,7 +447,8 @@ bool IsNullableSchema(JsonSchemaExporterOptions options)
 
                         if (propertyInfo is not null)
                         {
-                            return propertyInfo.IsGetNullable || propertyInfo.IsSetNullable;
+                            return (propertyInfo.Get is not null && propertyInfo.IsGetNullable) ||
+                                (propertyInfo.Set is not null && propertyInfo.IsSetNullable);
                         }
 
                         if (typeInfo.IsNullable)
diff --git a/src/libraries/System.Text.Json/tests/Common/JsonSchemaExporterTests.cs b/src/libraries/System.Text.Json/tests/Common/JsonSchemaExporterTests.cs
index 190166ef19c3f8..8355e80f3637e8 100644
--- a/src/libraries/System.Text.Json/tests/Common/JsonSchemaExporterTests.cs
+++ b/src/libraries/System.Text.Json/tests/Common/JsonSchemaExporterTests.cs
@@ -82,6 +82,30 @@ public void TreatNullObliviousAsNonNullable_True_MarksReferenceTypesAsNonNullabl
             Assert.Equal(expectedType, (string)schema["type"]!);
         }
 
+        [Fact]
+        public void GetOnlyProperties_DoNotUseSetterNullabilityInSchema() 
+        {
+            JsonNode schema = Serializer.DefaultOptions.GetJsonSchemaAsNode(typeof(PocoWithGetOnlyProperties));
+            const string ExpectedJsonSchema = """
+                {
+                    "type": ["object", "null"],
+                    "properties": {
+                        "Values": {
+                            "type": "array",
+                            "items": { "type": ["string", "null"] }
+                        },
+                        "SingleValueGetOnly": { "type": "string" },
+                        "NullableGetOnly": { "type": ["string", "null"] },
+                        "SingleValueGetSet": { "type": "string" },
+                        "NonNullableReadonlyField": { "type": "string" },
+                        "NullableReadonlyField": { "type": ["string", "null"] }
+                    }
+                }
+                """;
+
+            AssertValidJsonSchema(typeof(PocoWithGetOnlyProperties), ExpectedJsonSchema, schema);
+        }
+
         [Theory]
         [InlineData(typeof(Type))]
         [InlineData(typeof(MethodInfo))]
@@ -262,6 +286,21 @@ public void LegacySchemaExporter_CanAccessReflectedMembers()
 
         record PocoWithProperty(int Value);
 
+        sealed class PocoWithGetOnlyProperties
+        {
+            public IEnumerable<string> Values => [];
+            public string SingleValueGetOnly { get; } = "value";
+            public string? NullableGetOnly { get; }
+            public string SingleValueGetSet { get; set; } = "value";
+            [JsonInclude]
+            public readonly string NonNullableReadonlyField = "value";
+
+#pragma warning disable CS0649 // field never assigned to
+            [JsonInclude]
+            public readonly string? NullableReadonlyField;
+#pragma warning restore CS0649
+        }
+
         [JsonSerializable(typeof(PocoWithProperty))]
         partial class PocoWithPropertyContext : JsonSerializerContext;