Looks like ash:
Single samarah seeds, compound leaves without lobed petioles and symetrical tree form with opposite branching (not possible to make out in the photo). Probably white ash or green ash, not clear enough to distinguish from the photos. White ash has purple or brown overwintering branch tips on current growth (In my area they are purple)
Box elder (ash-leaf maple) has double samarah seeds, compound leaves with lobed petioles and no symetry to its form. Green or purplish branch tips on up to five years of growth.