Wejherowo founded in 1643 years Wejhera voivode Jacob, received city rights in 1650 years. After 1676 years over the ownership of local magnate families (for some time also belonged to Sobieskich). As a result, in 1772 and cutting przyłączono them to Prussia. 1818 was a town in the district rejencji Gdansk (West Prussia). Wejherowo 1870 (which is called the Neustadt) received a call from the Railway Gdansk and Koszalin. At that time the city was inhabited mostly by Germans and Kashubians. At the turn of the nineteenth and early twentieth century developed economically. 

In 1920 returned to polish (despite the protests of the local population). It has become established in the marine district Pomerania (which also included the Puck and Hel). Soon, the structure has begun to slow demographic change for the benefit of the Poles. In the two decades between was one of the main centers of regionalism (autonomizację It was in the Pomerania region of Poland). 

In September 1939, Wejherowo occupied by the Germans again have been changed to Neustadt, the mayor deserved Teodor Bolduan was immediately arrested and shot. Shortly after the end of hostilities, came to town gauleiter Pomorze Arthur Greiser, who publicly pogroził antyniemiecko nastawionym Wejherowo residents. During the occupation is acting conspiratorial organization TOW "Pomeranian Griffin". At the turn of the years 1939 and 1940 in Germany Piaśnicy Great shot 10-12 thousand. representatives of local intelligentsia (including many wejherowian). 

In March 1945 the Soviet army entered the city. In 1975, the district has lost its status Wejherowo that in 1999 it again to recover (under the Pomorskie voivodship). 

At a glance: 
* VII-IX century - Slavic settlement on the Mount and Castle Castle 
* 1576 - held Starost Puckiego Ernest Wejhera 
* 1643 - the location of settlements called Wejherowska prefer rural land Śmiechowo 
* 1644 - Church of St. foundation. Trinity by James Wejhera 
* 1649 - the issuing of building permits by the Bishop of the Calvary włocławsko-Pomorskie Gniewosz Albert Nicholas, part of a chapel was founded by Jacob Weiher as a vote of gratitude for salvation during the trip to Smolensk, left the rest of his relatives and friends 
* 1650 - Wejherowska Wola chełmiński received its town charter from King John Kaziemierza 
* The end of the seventeenth century - Property Radziwill, then Sobieskich 
* The eighteenth century - Property Przebendowskich 
* 1772 - Prussian town into zaborem 
* 1796 - the city bought the count Keyserlink 
* 1870 - the rail link to Gdansk and Koszalin 
* 1920 - Polish border in Wejherowo 
* 1975 - no longer the status of the city district as a result of administrative reform 
* 1999 - the restoration of the status of the district as a result of further administrative reform, Wejherowo in Pomorskie voivodship