The Wallkill River, a tributary of the Hudson, drains Lake Mohawk in Sparta, New Jersey, flowing from there generally northeasterly 88.3 miles (142.1 km) to Rondout Creek in New York, just downstream of Sturgeon Pool, near Rosendale, with the combined flows reaching the Hudson at Kingston.

The Andries DuBois House is located on Wallkill Avenue in the hamlet of Wallkill, New York, USA. It is the oldest house in the hamlet, reflecting several different eras of architecture and regional history, and has been a Registered Historic Place since 1998.

The William Bull III House is on a hill overlooking the Wallkill River in the Town of Wallkill in Orange County, New York. It was built by Bull, an early settler of the region, sometime in the 1780s. Bull and his son William IV, on returning home from serving with Gen. George Washington's campaign against the British, had been impressed with the buildings of Baltimore and other Atlantic seaports visited during his military service. The name "Brick Castle" is shared among a few early brick homes constructed in the area around the same time. Bull, himself a stonemason by trade, decided upon arriving home to build a brick homestead. He is also known for having constructed Gen. Washington's headquarters at Newburgh, NY.

The Dubois-Phelps House is a farmhouse located off Wallkill Road outside of the village of Walden in the Town of Montgomery, New York, United States. It is in the center of Riverside Farm, close to the Wallkill River.

Franklin is a borough in Sussex County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 5,045 reflecting a decline of 115 (-2.2%) from the 5,160 counted in the 2000 Census, which had in turn increased by 183 (+3.7%) from the 4,977 counted in the 1990 Census.

Gardiner is a town in the south-central part of Ulster County, New York. The population was 5,713 at the 2010 census.

Goshen is a town in Orange County, New York, United States. The population was 13,687 at the 2010 census. The town is named after the land of Goshen, and contains a village also called Goshen, the county seat of Orange County. The town is centrally located in the county.

Historic Huguenot Street is located in New Paltz, New York, approximately 90 miles (140 km) north of New York City. The seven stone houses and several accompanying structures in the 10-acre National Landmark Historic District were likely built in the early 18th century by Huguenot settlers fleeing discrimination and religious persecution in France and what's now southern Belgium. After negotiating with the Esopus Indians, this small group of Huguenots settled on a flat rise on the banks of the Wallkill River in 1678. The settlers named the site in honor of Die Pfalz, the region of present-day Germany that had provided them temporary refuge before they came to America. Recent archaeological finds indicate that the immediate area settled by the Huguenots was occupied by Native Americans prior to European contact. The site is one of the oldest continuously inhabited settlements in the United States.
Lake Mohawk is an unincorporated residential development and census-designated place (CDP) split between Byram Township and Sparta Township, in Sussex County, New Jersey, United States. As of the 2010 United States Census, the CDP's population was 9,916, of which 1,824 were in Byram Township and 8,092 in Sparta Township.

Montgomery is a village located in Orange County, New York, United States, 60 (97 km) miles northwest of New York City, and 90 miles (140 km) southwest of Albany. The population was 3,814 at the 2010 census. It is part of the Poughkeepsie–Newburgh–Middletown, NY Metropolitan Statistical Area as well as the larger New York–Newark–Bridgeport, NY-NJ-CT-PA Combined Statistical Area. The village is named after General Richard Montgomery, an officer of the American Revolution.

The Montgomery Worsted Mills, known today as Montgomery Mills, is along the Wallkill River at the end of Factory Street in the Orange County village of Montgomery, New York. It was one of the earliest efforts to harness the river for industrial purposes.

Montgomery is a town in Orange County, New York, United States. The population was 22,606 at the 2010 census. It was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 at the Battle of Quebec. The northern town line is contiguous with the Ulster County border. Montgomery is immediately west of the town of Newburgh. Within its borders are three villages, one eponymous, as well as Walden and most of Maybrook.

New Paltz is a U.S. town in Ulster County, New York. The population was 14,003 at the 2010 census. The town is located in the southeastern part of the county and is south of Kingston. New Paltz contains a village also with the name New Paltz. The town is named for Palz, the dialect name of the Palatinate, called Pfalz in standard German.

New Paltz is a village in Ulster County located in the U.S. state of New York. It is about 80 miles (130 km) north of New York City and 70 miles (110 km) south of Albany. The population was 6,818 at the 2010 census.

Ogdensburg is a borough in Sussex County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 2,410 reflecting a decline of 228 (-8.6%) from the 2,638 counted in the 2000 Census, which had in turn declined by 84 (–3.1%) from the 2,722 counted in the 1990 Census.

Peachcroft, sometimes referred to as the James Wilson Brown House, is located along River Road between Walden and Montgomery in the Town of Montgomery, New York, United States. It is built in a combination of the Federal and Queen Anne architectural styles.

Rifton is a hamlet in Ulster County, New York, United States. The population was 456 at the 2010 census.

Shawangunk is a town in southwestern Ulster County, New York, USA. The population was 14,332 at the 2010 census. Like the neighboring mountain range, for which it is named, it is pronounced either as the Munsee Lenape, Shawangunk, or as the colonial Shongum SHON-gum by local residents.

Sparta Township is a township in Sussex County, New Jersey, United States. As of the 2010 United States Census, the township's population was 19,722, reflecting an increase of 1,642 (+9.1%) from the 18,080 counted in the 2000 Census, which had in turn increased by 2,923 (+19.3%) from the 15,157 counted in the 1990 Census.

Sturgeon Pool is a reservoir near the hamlet of Rifton, in the Town of Esopus in Ulster County, New York.

Walden is the largest of three villages of the Town of Montgomery in Orange County, New York, United States. The population was 6,978 at the 2010 census. It has the ZIP Code 12586 and the 778 telephone exchange within the 845 area code. Walden is part of the Poughkeepsie−Newburgh−Middletown, NY Metropolitan Statistical Area as well as the larger New York−Newark−Bridgeport, NY-NJ-CT-PA Combined Statistical Area.

Wallkill River National Wildlife Refuge is part of the National Wildlife Refuge system. Established in 1990 by Public Law 101-593, the refuge straddles nine miles (14 km) of the Wallkill River at and just south of the New York-New Jersey border. Most of the refuge is in Sussex County, New Jersey, with the remainder in Orange County, New York. Two miles (3.2 km) of the Appalachian Trail travel through the refuge, and the refuge has four additional walking trails.

The Wallkill Valley Railroad is a defunct railroad which once operated in Ulster and Orange counties in upstate New York. Its corridor was from Kingston in the north to Montgomery in the south, with a leased extension to Campbell Hall. It crossed both the Wallkill River and Rondout Creek.

Wallkill is a town in Orange County, New York, United States. The population was 27,426 at the 2010 census. It is centrally located in the county. Interstate 84 crosses New York State Route 17 in the southern part of the town. U.S. Route 6 and New York State routes 17K, 211 and 302 also cross portions of the town.

Wallkill is a hamlet, generally identified as coterminous with ZIP code 12589, telephone exchange 895 in the 845 area code and most of the Wallkill Central School District located mostly in the eastern half of the Town of Shawangunk, Ulster County, New York but partly spilling over into adjacent regions of the Orange County towns of Newburgh and Montgomery. The population was 2,288 at the 2010 census.

The Daniel Waring House, also known as Indian Hill, is located on River Road just outside the village of Montgomery, New York, United States. It sits on a large parcel of land overlooking the Wallkill River at the junction of River Road and NY 17K, just opposite the western approach to Ward's Bridge.

Warwick is a town in the southwestern part of Orange County, New York, United States. Its population was 32,065 at the 2010 census. The town contains three villages and eight hamlets.

Wawayanda is a town in Orange County, New York, in the United States. The population was 7,266 as recorded by the 2010 census. The town of Wawayanda is in the western part of the county, south of Middletown.