Lars Larson is the older brother of Kirsten Larson.
- Name: Lars Larson
- First Appearance: Meet Kirsten
- Anders Larson: Father
- Greta Larson: Mother
- Kirsten Larson: Younger Sister
- Peter Larson: Younger Brother
- Britta Larson: Baby Sister
- Olav Larson: Uncle
- Inger Larson: Aunt
- Lisbeth Larson: Cousin
- Anna Larson: Cousin
In the Books
Meet Kirsten: An American Girl
Kirsten Learns a Lesson: A School Story
Kirsten's Surprise: A Christmas Story
Happy Birthday, Kirsten!: A Springtime Story
Kirsten Saves The Day: A Summer Story
Changes for Kirsten: A Winter Story
Lars, John Stewart, and Kirsten are out hunting and setting traps in the forest, as the men have gone to work at the logging camp for the winter. Lars convinces John to let Kirsten come with them due to her knowledge about the animals and forest, and warns her about bringing home a wounded baby raccoon.
Following the destruction of the Larson cabin, Lars makes preparations to go trapping with John; upon hearing John's news that the Stewarts will be heading to Oregon, he expresses a desire to go to Oregon as well. He is optimistic that any furs and pelts caught before Papa returns home with his earnings will be enough for the Larsons to purchase the Stewarts' house.
On a trapping excursion, Lars and Kirsten are unable to return to the farm. When Kirsten finds a set of footprints from old-fashioned snowshoes, Lars identifies them as possibly being Old Jack's footprints. Upon following the tracks to Old Jack's cave and finding Old Jack dead, Lars has to remind Kirsten that staying inside the cave would be much safer for the two of them than trying to find their way home in the dark. He is amazed at the quantity and the quality of the furs and pelts Old Jack managed to trap, and since Old Jack is dead and with no known relations, Lars says the furs and pelts now belong to the Larsons. Lars tells Kirsten at daybreak, they will bring the furs back with them, pile stones at the door to prevent any wild animals from entering the cave, and when Papa returns in the spring, they will come back and give Old Jack a proper burial.