Moodna Creek (Munsee: Waoraneck) is a small tributary of the Hudson River that drains eastern Orange County, New York.

At 15.5 miles (25 km)[1] in length from its source at the confluence of Cromline Creek and Otter Kill west of Washingtonville, it is the longest stream located entirely within the county.

[4] Writer Nathaniel Parker Willis, while living in Cornwall, near the creek's mouth, in the mid-19th century, popularized the name "Moodna.

After that point, the Moodna turns southward slightly, following the curve of Schunemunk's north end under the Thruway and leaving the Route 94 corridor.

Following Old Forge Hill briefly, it passes its last road crossing at US 9W, site of a small hamlet referred to once as Moodna Village and location of a small cottage once occupied by James and Ellen Gaffney, then bends southwards back into Cornwall to empty into the Hudson amid tidal marshes.

The 75 acres (30 ha) of tidal marsh in the creek's estuary, between Route 9W and the Hudson, are home to several rare plants and natural communities.

While the water quality in that area remains generally good, there is effluent from the Town of New Windsor's sewage treatment plant.

[5] In 1798, however, Rockland County was created, and the line was adjusted northward, giving Orange the current towns of Newburgh, Montgomery and Crawford as compensation for the lost territory.

[10] By 1965, the Moodna was so heavily polluted that, according to Lee Mailler, he had seen the water run "green, pink, cream and blue" but that it usually looked "like curdled milk."

[17][18] This caused the closing of part of Butternut Drive, and all of Forge Hill Road, except the easternmost 640 feet (200 m), from Route 9W to Staples Lane.

The six miles (10 km) between Woodbury Creek and Old Forge Hill Road in Cornwall have become a popular place for whitewater kayaking.

The New York State Department of Environmental Conservation keeps Moodna Creek regularly stocked with brown and rainbow trout.