| KAHLE | B T | contractor | boards Grand Central | Karns City | |
| KANE | Charles | boiler maker | boards O'Brien house | Millerstown | |
| KANE | J S | of kane & Mullen | Main | Karns City | |
| KANE & MULLEN | druggist | Main | Karns City | ||
| KAPPELER | G | brewery | McKean | Butler | |
| KARNS CITY DEPOSIT BANK | of Ralston, McQuaide & Co | Main | Karns City | ||
| KARNS CITY LAUNDRY | Main | Karns City | |||
| KARNS CITY OPERA HOUSE | Main | Karns City | |||
| KARNS CITY RESTAURANT | MATHEW, J A | proprietor | opposite depot | Karns City | |
| KARNS PIPE LINE | James W. Steele | manager | office near Railroad | Petrolia | |
| KAUFFMAN | Henry | shoemaker | Main | Zelienople | |
| KAUFFMAN | Jacob | Main | Zelienople | ||
| KAUFFMAN | William | teamster | Main | Zelienople | |
| KEARNS | Amos | clerk | boards west Jefferson | Butler | |
| KEARNS | Patton | grocer | west Jefferson | Butler | |
| KECK | George | clerk | north Main | Butler | |
| KECK | Jacob | undertaker, &e | north Main | Butler | |
| KECK | Louis | blacksmith | west Jefferson | Butler | |
| KECK | Philip | blacksmith | boards Mill | Millerstown | |
| KEEFE | E | clothing store | Main | Millerstown | boards European hotel |
| KEEFE | T | pumper | boards Grand Central | Karns City | |
| KEEFER | Jacob | harness shop | east Cunningham | Butler | residence Mifflin |
| KEIL | George | clerk | west Jefferson | Butler | |
| KEIL | Henry | carpenter | east Jefferson | Butler | |
| KEIL | John | marble cutter | east Jefferson | Butler | |
| KEIL | John | marble cutter | Jefferson | Butler | |
| KEIL | Leonard | carpenter | east Jefferson | Butler | |
| KEIL | Sarah | east Jefferson | Butler | ||
| KELLERMAN | D F | dry goods, groceries, &c | Main | Karns City | |
| KELLEY | E M | of William Kelly & Bro | Main | Fairview | |
| KELLY | Andrew | boiler maker | boards White house | Petrolia | |
| KELLY | Daniel | livery stable | City hotel | Petrolia | |
| KELLY | J J | miller | New Castle | Centreville | |
| KELLY | James W | ||||
| KELLY | John T | of COCHRAN & KELLY | Main | Butler | |
| KELLY | Joseph | driller | boards Grand Central | Karns City | |
| KELLY | Joseph | barber | cor. Main and Jefferson | Butler | res. Locust |
| KELLY | P C | boiler shop | Main | Millerstown | |
| KELLY | Patrick | boarding house | east Cunningham | Butler | |
| KELLY | R B | of Reisinger & Kelly | boards Oil exchange | Petrolia | |
| KELLY | Sebastian H | barber | boards Locust | Butler | |
| KELLY | W C | driller | boards Grand Central | Karns City | |
| KELLY | W D | grocer | head Main | Millerstown | |
| KELLY | William | of William Kelly & Bro | Main | Fairview | |
| KELLY WILLIAM & BRO | boots and shoes | Main | Fairview | ||
| KELZIEL | Philip | Main | Zelienople | ||
| KEMP | James | shoemaker | near Kittanning | Millerstown | |
| KEMPER | B | of J & B KEMPER | east North | Butler | |
| KEMPER | Bernard | shoemaker | west Jefferson | Butler | |
| KEMPER | Frank | harness maker | east McKean | Butler | |
| KEMPER | J | of J & B KEMPER | south McKean | Butler | |
| KEMPER J & B | saddle and harness makers | Main | Butler | ||
| KEMPLE | Barney, Jr | shoemaker | west Jefferson | Butler | |
| KENNEDY | Charles | clerk | North | Butler | |
| KENNEDY | James | boiler maker | Main | Millerstown | |
| KENNEDY | O | Main | Greece City | ||
| KENNEDY | R V | agent Parker & Karns City Railroad | boards Monitor house | Petrolia | |
| KENNEDY | T | peddler | Butler | Prospect | |
| KENNEDY | William F | clerk | Main | Millerstown | |
| KENT | George | Hostler | boards European hotel | Millerstown | |
| KEPPLER | Capt. | Main | Greece City | ||
| KERR | Bruce | sawyer | Franklin | Centreville | |
| KERR | Daniel | riverman | Water | Butler | |
| KERR | James, Esq | Harrisville | |||
| KERR | John | carpenter | Main | Centreville | |
| KERR | Robb | Main | Centreville | ||
| KERR | Samuel | Harrisville | |||
| KERSTING | Theodore | physician and druggist | Evansburg | ||
| KERVEN | Daniel | laborer | boards Slippery Rock | Millerstown | |
| KERVIN | Patrick | tool dresser | boards Slippery Rock | Millerstown | |
| KERVIN | Thomas | contractor | boards Slippery Rock | Millerstown | |
| KETTERER | George | furniture dealer | boards Eitenmuller house | Butler | |
| KEYSTONE PIPE CO | corner Main and Mill | Millerstown | |||
| KIEFER | Minnie | widow | corner Franklin and Locust | Butler | |
| KILCHENSTEIN | Fred | tailor | Main | Petrolia | |
| KILCHENSTEIN | George | merchant tailor | Main | Petrolia | |
| KILLION | Philip | teamster | alley near Water | Butler | |
| KILROY | James B | grocery and bakery | Main | Petrolia | |
| KIMMELL | T A | physician | north Main | Butler | |
| KINCH | Darnell | tailor | boards Railroad | Karns City | |
| KING | Conrad | shoemaker | Main | Zelienople | |
| KING | Fred | printer | Water | Butler | |
| KING | George | teamster | Main | Fairview | |
| KING | J H | Saxonburg | |||
| KING | J H | clerk | boards Boulger house | Petrolia | |
| KING | John | tailor | Water | Butler | |
| KING | L C | valve cup maker | boards Eastern house | Petrolia | |
| KINGSBURY | Cyrus | merchant | Main | Centreville | |
| KINGSBURY | Elisha | merchant | Main | Centreville | |
| KINKEAD | Henry | blacksmith | Butler | Prospect | |
| KINKELMAN | Rev L M | pastor Lutheran Church | Main | Zelienople | |
| KINSEY | Jacob | Portersville | |||
| KINSLEY | Adam | driller | boards O'Brien house | Millerstown | |
| KIP | William | civil engineer | Main | Petrolia | |
| KIPP | Silas | engineer | corner Washington and North | Butler | |
| KIRKPATRICK | W B | Portersville | |||
| KISSICK | Robert | shoemaker | Main | Centreville | |
| KITZENGER BROS | cigar dealers | boards Reiber house | Millerstown | ||
| KLINE | F G | tinner | Main | Zelienople | |
| KLINE | Fred | Broad | Harmony | ||
| KLINE | George | cooper | corner Wood and German | Harmony | |
| KLINE | J C | phrenologist | Main | Butler | |
| KLINE | John | turnkey | boards west Diamond | Butler | |
| KLINE | Leonard | laborer | Broad | Harmony | |
| KLINE | Matthew | laborer | alley near Water | Butler | |
| KLINGLER | Julius | flour mill | Mifflin | Butler | |
| KLOPFENSTIEN | Fred | Main | Harmony | ||
| KLOTZBUERGER | Jacob | wagon maker | Jamison | Petrolia | |
| KLUGH | George A | of S B Bishop & Co | Main | Fairview | |
| KNAPP | Charles | carpenter | boards Water | Millerstown | |
| KNESS | William | New Castle | Prospect | ||
| KNITTEL | Joseph | turner | McKean | Butler | |
| KNOBLOCH | John | saloon | west Jefferson | Butler | |
| KNOCH | Amelia | Saxonburg | |||
| KNOHMER | JOHN | proprietor Farmers' Inn | corner Mill and Green | Millerstown | |
| KNOX | Enoch | blacksmith | Mercer | Harmony | |
| KOCH | Charles | of Koch & Geisler | Meyer farm | Millerstown | |
| KOCH | Frank | clerk | corner Main and North | Butler | |
| KOCH | Mrs C | Groceries, Provisions, &e | corner Main and North | Butler | |
| KOCH | Susan | Main | Harmony | ||
| KOCH & GEISLER | clothes cleaners | Mill | Millerstown | ||
| KOCHLER | -------- | widow | Saxonburg | ||
| KOENIG | John | tailor | Water | Butler | |
| KOHLER | Frank | harness maker | Jefferson | Butler | |
| KOHLER | G | brewery | east Jefferson | Butler | |
| KOHNFELDER | Joseph | Saxonburg | |||
| KOONCE | H W | of H W Koonce & Co | Main | Karns City | |
| KOONCE | Margaret | Harrisville | |||
| KOONCE H W & CO | groceries, flour, feed, &c | Main | Karns City | ||
| KOPLER | J G | Saxonburg | |||
| KOPP | John | marble works | west Jefferson | Butler | res. Washington |
| KOPP | William | marble cutter | boards Washington | Butler | |
| KORN | Adam | shoemaker | Race | Butler | |
| KORN | Alexander | tanner | Water | Butler | |
| KOUNTZ | Bernard | teamster | North | Butler | |
| KRADLE | Philip | Main | Harmony | ||
| KRAUS | George | coal miner | Springdale | Butler | |
| KRAUSE | A | dealer in general merchandise | Railroad | Delano | |
| KRAUSE | R | dealer in general merchandise | Railroad | Delano | |
| KRAUTZ | Jacob | New Castle | Prospect | ||
| KRETSCHER | John | teamster | boards Eitenmuller house | Butler | |
| KRICKS | John | laborer | Springdale | Butler | |
| KRIDLER | Conrad | Main | Harmony | ||
| KROUP | Henry | laborer | McKean | Butler | |
| KRUG | G | of H & G KRUG | Main | Butler | |
| KRUG | H | of H & G KRUG | south McKean | Butler | |
| KRUG H & G | meat market | Main | Butler | ||
| KUNTZ | J M | Main | Greece City | ||
| KYLE | A L | Harrisville | |||
| KYLE | Thompson | Harrisville |