Streams in Armstrong County, Pennsylvania
The following table lists all the named streams that flow in Armstrong County. For each stream, the name, coordinate of the source, name of the stream it flows into, coordinate of the confluence, and political subdivision in which the confluence is located are given.
| Name | Source | Flows into | Mouth | Location |
| Allegheny River | 41°52′22″N 77°52′30″W | Ohio River | 40°26′36″N 80°00′54″W | Pittsburgh, Pennsylvania |
| Armstrong Run | 41°01′06″N 79°38′18″W | Allegheny River | 41°00′43″N 79°36′33″W | Perry Township |
| Beers Run | 40°41′01″N 79°31′16″W | Crooked Creek | 40°41′51″N 79°30′17″W | Burrell Township |
| Big Run | 40°43′25″N 79°39′18″W | Allegheny River | 40°40′52″N 79°40′11″W | South Buffalo Township |
| Birch Run | 41°01′16″N 79°37′49″W | Allegheny River | 41°02′00″N 79°37′09″W | Perry Township |
| Brady Run | 40°40′04″N 79°34′39″W | Kiskiminetas River | 40°37′57″N 79°36′33″W | Leechburg |
| Buffalo Creek | 40°56′46″N 79°47′19″W | Allegheny River | 40°40′11″N 79°41′34″W | Freeport |
| Bullock Run | 40°54′42″N 79°25′44″W | North Fork Pine Creek | 40°52′48″N 79°26′28″W | Boggs Township |
| Camp Run | 40°53′40″N 79°17′33″W | Mahoning Creek | 40°55′29″N 79°17′23″W | Wayne Township |
| Campbell Run | 40°44′35″N 79°27′02″W | Crooked Creek | 40°43′43″N 79°32′13″W | Manor Township |
| Carnahan Run | 40°37′50″N 79°28′34″W | Kiskiminetas River | 40°36′44″N 79°35′02″W | Parks Township |
| Cathcart Run | 40°59′15″N 79°18′06″W | Mahoning Creek | 40°57′25″N 79°18′45″W | Mahoning Township |
| Cave Run | 40°55′43″N 79°22′24″W | Mahoning Creek | 40°56′19″N 79°22′19″W | Mahoning Township |
| Cessna Run | 40°46′20″N 79°19′32″W | South Branch Plum Creek | 40°42′14″N 79°19′09″W | Plumcreek Township |
| Cherry Run | 40°44′57″N 79°20′40″W | Crooked Creek | 40°40′25″N 79°27′32″W | Burrell Township |
| Coal Bank Run | 40°41′22″N 79°31′19″W | Crooked Creek | 40°42′12″N 79°30′41″W | Bethel Township |
| Cornplanter Run | 40°46′19″N 79°44′06″W | Buffalo Creek | 40°45′16″N 79°40′21″W | South Buffalo Township |
| Cove Run | 41°00′58″N 79°39′48″W | Sugar Creek | 40°59′15″N 79°38′03″W | Bradys Bend Township |
| Cowanshannock Creek | 40°49′34″N 79°10′32″W | Allegheny River | 40°51′04″N 79°30′28″W | Gosford |
| Craig Run | 40°36′12″N 79°22′30″W | Crooked Creek | 40°38′08″N 79°24′00″W | South Bend Township |
| Craigs Run | 40°49′40″N 79°18′30″W | Cowanshannock Creek | 40°47′42″N 79°18′36″W | Rural Valley |
| Crooked Creek | 40°41′44″N 79°04′43″W | Allegheny River | 40°44′57″N 79°33′18″W | Bethel Township Manor Township |
| Deaver Run | 40°52′12″N 79°23′59″W | South Fork Pine Creek | 40°51′08″N 79°25′16″W | Boggs Township Valley Township |
| Dutch Run | 40°42′29″N 79°14′39″W | Plum Creek | 40°41′12″N 79°19′41″W | Plumcreek Township |
| Elbow Run | 40°44′06″N 79°27′27″W | Crooked Creek | 40°43′05″N 79°29′43″W | Kittaning Township |
| Elder Run | 40°41′23″N 79°34′21″W | Kiskiminetas River | 40°38′52″N 79°37′33″W | Gilpin Township |
| Fagley Run | 40°41′04″N 79°22′48″W | Crooked Creek | 40°39′07″N 79°25′24″W | Burrell Township |
| Flat Run | 40°34′06″N 79°28′16″W | Kiskiminetas River | 40°32′10″N 79°30′17″W | Kiskiminetas Township |
| Foundry Run | 40°55′55″N 79°11′20″W | Mahoning Creek | 40°54′37″N 79°13′15″W | Wayne Township |
| Garretts Run | 40°45′32″N 79°27′22″W | Allegheny River | 40°47′40″N 79°31′02″W | Manor Township |
| Glade Run | 40°50′42″N 79°12′23″W | Mahoning Creek | 40°54′53″N 79°15′47″W | Wayne Township |
| Glade Run | 40°54′17″N 79°34′24″W | Allegheny River | 40°45′08″N 79°34′06″W | Cadogan Township |
| Gobblers Run | 40°37′11″N 79°18′39″W | Crooked Creek | 40°38′03″N 79°21′37″W | South Bend Township |
| Guffy Run | 40°40′46″N 79°33′25″W | Kiskiminetas River | 40°37′59″N 79°34′54″W | Gilpin Township Parks Township |
| Hamilton Run | 40°58′46″N 79°19′44″W | Mahoning Creek | 40°57′00″N 79°19′16″W | Mahoning Township near Putneyville |
| Hart Run | 40°57′00″N 79°38′30″W | Sugar Creek | 40°59′16″N 79°37′57″W | Bradys Bend Township |
| Hays Run | 40°50′29″N 79°26′33″W | Allegheny River | 40°51′44″N 79°28′59″W | Rayburn Township |
| Hill Run | 40°43′44″N 79°37′55″W | Allegheny River | 40°41′41″N 79°37′15″W | South Buffalo Township |
| Holder Run | 40°57′43″N 79°40′30″W | Sugar Creek | 40°59′10″N 79°38′16″W | Bradys Bend Township |
| Horney Camp Run | 40°43′43″N 79°27′09″W | Crooked Creek | 40°42′30″N 79°29′59″W | Burrell Township |
| Huling Run | 40°54′47″N 79°35′17″W | Allegheny River | 40°59′01″N 79°34′32″W | Washington Township |
| Huskins Run | 40°45′16″N 79°20′40″W | Cowanshannock Creek | 40°47′54″N 79°22′14″W | Cowanshannock Township |
| Knapp Run | 40°43′39″N 79°38′14″W | Allegheny River | 40°41′44″N 79°38′46″W | South Buffalo Township |
| Kiskiminetas River | 40°29′08″N 79°27′14″W | Allegheny River | 40°40′46″N 79°40′01″W | near Freeport, Pennsylvania |
| Laurel Run | 40°50′03″N 79°23′05″W | South Fork Pine Creek | 40°50′40″N 79°23′58″W | Boggs Township Valley Township |
| Limestone Run | 40°54′58″N 79°33′10″W | Allegheny River | 40°51′21″N 79°30′28″W | East Franklin Township |
| Lindsay Run | 40°36′35″N 79°24′02″W | Crooked Creek | 40°38′05″N 79°24′07″W | South Bend Township |
| Little Mudlick Creek | 40°59′52″N 79°15′25″W | Mahoning Creek | 40°57′10″N 79°18′09″W | Redbank Township |
| Little Sandy Creek | 41°01′39″N 78°57′31″W | Redbank Creek | 41°02′44″N 79°13′48″W | Redbank Township |
| Long Run | 40°35′52″N 79°25′26″W | Kiskiminetas River | 40°32′00″N 79°28′34″W | Kiskiminetas Township |
| Long Run | 40°40′28″N 79°24′38″W | Fagley Run | 40°39′14″N 79°25′14″W | South Bend Township |
| Long Run | 40°54′31″N 79°35′33″W | Patterson Creek | 40°52′03″N 79°38′15″W | West Franklin Township |
| Long Run | 40°59′39″N 79°41′54″W | Sugar Creek | 40°58′49″N 79°40′24″W | Bradys Bend Township |
| Long Run | 40°49′39″N 79°23′15″W | Cowanshannock Creek | 40°48′34″N 79°24′40″W | Valley Township |
| Mahoning Creek | 40°58′26″N 78°51′22″W | Allegheny River | 40°55′59″N 79°27′40″W | Madison Township and Pine Township |
| Marrowbone Run | 40°46′50″N 79°37′15″W | Buffalo Creek | 40°47′37″N 79°39′06″W | North Buffalo Township |
| Mast Run | 40°57′47″N 79°31′07″W | Allegheny River | 40°56′49″N 79°32′39″W | Madison Township |
| Mill Run | 40°45′57″N 79°23′30″W | Cowanshannock Creek | 40°48′29″N 79°27′47″W | Rayburn Township |
| Mudlick Creek | 41°01′14″N 79°13′25″W | Pine Run | 40°57′45″N 79°15′09″W | Redbank Township |
| Nicholson Run | 40°47′09″N 79°36′19″W | Allegheny River | 40°43′34″N 79°35′13″W | South Buffalo Township |
| Nolf Run | 41°00′11″N 79°12′24″W | Little Sandy Creek | 41°02′21″N 79°13′06″W | Redbank Township |
| North Branch Cherry Run | 40°45′21″N 79°26′53″W | Cherry Run | 40°41′08″N 79°25′33″W | Burrell Township |
| North Branch Plum Creek | 40°49′33″N 79°10′02″W | Keystone Lake | 40°43′13″N 79°18′09″W | Plumcreek Township |
| North Branch South Fork Pine Creek | 40°51′03″N 79°15′52″W | South Fork Pine Creek | 40°50′58″N 79°19′43″W | Wayne Township near Echo. |
| North Fork Pine Creek | 40°53′26″N 79°19′48″W | Pine Creek | 40°52′27″N 79°28′06″W | Boggs Township |
| Nye Branch | 40°56′37″N 79°09′29″W | Sugarcamp Run | 40°57′45″N 79°13′17″W | Redbank Township |
| Patterson Creek | 40°57′11″N 79°40′51″W | Buffalo Creek | 40°51′06″N 79°38′17″W | West Franklin Township |
| Pine Creek | 40°52′27″N 79°28′08″W | Allegheny River | 40°52′16″N 79°28′41″W | Boggs Township Rayburn Township |
| Pine Run | 40°43′04″N 79°26′45″W | Crooked Creek | 40°41′15″N 79°28′28″W | Burrell Township |
| Pine Run | 41°00′57″N 79°40′32″W | Sugar Creek | 40°59′10″N 79°39′15″W | Bradys Bend Township |
| Pine Run | 40°46′33″N 79°37′33″W | Buffalo Creek | 40°43′59″N 79°40′46″W | South Buffalo Township |
| Pine Run | 40°58′10″N 79°06′29″W | Mahoning Creek | 40°56′47″N 79°16′39″W | Redbank Township |
| Plum Creek | 40°43′14″N 79°18′09″W | Crooked Creek | 40°39′56″N 79°19′45″W | Plumcreek Township |
| Rattling Run | 40°36′40″N 79°30′30″W | Roaring Run | 40°33′39″N 79°31′38″W | Kiskiminetas Township |
| Redbank Creek | 41°09′30″N 79°04′36″W | Allegheny River | 40°58′55″N 79°33′00″W | Madison Township |
| Roaring Run | 40°36′18″N 79°26′27″W | Kiskiminetas River | 40°33′04″N 79°32′10″W | Kiskiminetas Township |
| Rough Run | 40°49′13″N 79°48′14″W | Buffalo Creek | 40°47′05″N 79°41′16″W | North Buffalo Township |
| Rupp Run | 40°46′25″N 79°26′39″W | Garretts Run | 40°47′03″N 79°29′42″W | Manor Township |
| Scrubgrass Creek | 40°54′45″N 79°19′29″W | Mahoning Creek | 40°55′33″N 79°25′26″W | Mahoning Station, Pine Township |
| Sipes Run | 40°47′09″N 79°40′28″W | Buffalo Creek | 40°46′09″N 79°40′22″W | South Buffalo Township |
| Snyders Run | 40°56′28″N 79°35′48″W | Allegheny River | 40°58′12″N 79°35′22″W | Bradys Bend Township |
| South Branch Cowanshannock Creek | 40°49′15″N 79°10′40″W | Cowanshannock Creek | 40°47′51″N 79°15′55″W | Cowanshannock Township |
| South Branch Plum Creek | 40°47′13″N 79°04′34″W | Plum Creek | 40°43′13″N 79°18′09″W | Plumcreek Township |
| South Branch South Fork Pine Creek | 40°49′13″N 79°16′33″W | South Fork Pine Creek | 40°50′58″N 79°19′43″W | Wayne Township |
| South Fork Pine Creek | 40°50′58″N 79°19′42″W | Pine Creek | 40°52′27″N 79°28′06″W | Rayburn Township |
| Spra Run | 40°45′54″N 79°23′04″W | Cowanshannock Creek | 40°48′39″N 79°25′08″W | Valley Township |
| Spruce Run | 40°51′03″N 79°14′26″W | Cowanshannock Creek | 40°49′01″N 79°14′41″W | Cowanshannock Township |
| Spur Run | 40°40′55″N 79°33′17″W | Taylor Run | 40°42′08″N 79°33′22″W | Bethel Township |
| Sugar Creek | 40°58′11″N 79°42′33″W | Allegheny River | 40°59′31″N 79°36′49″W | Bradys Bend Township |
| Sugar Run | 40°40′39″N 79°22′39″W | Crooked Creek | 40°38′15″N 79°24′18″W | South Bend Township |
| Sugarcamp Run | 40°59′40″N 79°13′05″W | Mudlick Creek | 40°57′43″N 79°14′13″W | Redbank Township |
| Taylor Run | 40°40′37″N 79°31′38″W | Allegheny River | 40°42′28″N 79°34′49″W | Bethel Township |
| Tub Mill Run | 40°45′43″N 79°30′36″W | Allegheny River | 40°45′23″N 79°32′50″W | Manor Township |
| Watson Run | 40°43′24″N 79°37′22″W | Allegheny River | 40°42′07″N 79°36′19″W | South Buffalo Township |
| Whiskey Run | 41°00′52″N 79°38′28″W | Sugar Creek | 40°59′57″N 79°37′28″W | Bradys Bend Township |
| Wiskey Creek | 40°55′06″N 79°26′06″W | Allegheny River | 40°55′12″N 79°27′48″W | Pine Township |