Is a lemon cypress deer resistant?

Yes, this is deer resistant. The more formal name for the lemon cypress is: cupressus macrocarpa . Because of the lemony scent, it is unattractive in smell and taste to the deer, they will avoid at all costs.

There are other deer resistant trees:

Cryptomeria, Spruce, Douglas Fir, White Pine, Hemlock, Deodar Cedar, Eastern Red Cedar, Japanese Cedar, Japanese Maple, Norway Maple, Paperbark Maple, Red Maple, Silver Maple, Striped Maple, Sugar Maple, Chinese Paper Birch, European White Birch, Heritage Birch, Himalayan Birch, Paper Birch, River Birch, Yellow Birch, Bald Cypress, False Cypress, Japanese False cypress, American Holly, Aquipernyi Holly, Flowering Dogwood, Himalayan Dogwood, Kousa Dogwood, and Rough-leaf Dogwood.