•
Lauge Koch (1892–1964), Danish expedition leader in Greenland •
Lothar Koch (musician) (1935–2003), German oboist •
Ludwig Koch (disambiguation), several people •
Lydia Lunch (born 1959), American musician, singer, poet, spoken word performer, born Lydia Konch •
Marco Koch (born 1990), German swimmer •
Marianne Koch (born 1931), German actress and physician •
Marita Koch (born 1957), German sprint athlete •
Mariza Koch (born 1944), Greek folk singer •
Markus Koch (born 1963), American football defensive lineman •
Martin Koch (novelist) (1882–1940), Swedish novelist •
Martin Koch (ski jumper) (born 1982), Austrian ski jumper •
Máté Tamás Koch (born 1999), Hungarian épée fencer •
Matt Koch (born 1990), American baseball player •
Matthias Koch (born 1988), Austrian football midfielder •
Max Koch (disambiguation), several people •
Meinolf Koch (born 1957), German football player •
Michael Koch (disambiguation), several people •
Mogens Koch (1898–1992), Danish architect •
Noppie Koch (1932–2010), Dutch cyclist and pacer •
Norma Koch (1898–1979), Academy Award winning costume designer •
Nynne Koch (1915–2001), Danish novelist and women's studies researcher •
Olga Koch (born 1992), Russian-British comedian •
Patrik Koch, Slovak ice hockey player •
Paulie Koch (born 1996), world champion wakeboarder •
Pauline Koch (1858–1920), Albert Einstein's mother •
Payton Koch (born 1996), American film editor •
Philippe Koch (born 1991), Swiss football defender •
Pete Koch (born 1962), American football player and actor •
Peter Koch (wood scientist) (1920–1998), American wood scientist and industrial engineer •
Peter Rutledge Koch (born 1943), American artist book publisher, designer •
Pierre Koch (1895–1978), French engineer •
Pietro Koch (1918–1945), Italian police leader •
Polly Koch (1895–1976), American football player •
Pyke Koch (1901–1991), Dutch artist •
Raphael Koch (born 1990), Swiss footballer •
Richard Koch (born 1950), management consultant, entrepreneur, and writer •
Richard H. Koch (1852–1945), American judge and railroad owner •
Rickard Koch (born 1976), Swedish bandy player •
Robert Koch (1843–1910), German physician, discoverer of the tubercle and cholera bacilli, Nobel Prize in Medicine laureate in 1905 •
Robert Koch (footballer) (born 1986), German footballer •
Robert Koch Woolf (1923–2004), American interior decorator •
Robin Koch (born 1996), German footballer •
Roland Koch (born 1958), German politician •
Roland Koch (footballer) (born 1952), German football manager •
Roscoe R. Koch (1887–1963), American politician •
Rosslyn Koch (1886–?), Ceylonese politician •
Rudolf Koch (1876–1934), German calligrapher, typographic artist and teacher ==S–Z==